Home Theater Project

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Originally Posted by KirK

Not only did Robin Williams die yesterday; my Uncle Stevie Morey passed as well. My Uncle Steve was really gifted with carving and painting decoys. Before I began my elementary education way back in '89, I used to be OC with watching hummingbirds. My brother and I asked if he could paint some decoy hummingbirds my father had made. In the end, the decoys looked spot on and often confused the usual fair of Ruby Throated hummers that came to the feeder. But, I sorta had to abandon that instance of OCD from the 90's onward because of school. Nonetheless, I am thankful for having Uncle Stevie Morey in my life.:)

Having Asperger's, I can completely empathize with Williams bout with depression and the onslaught of suicidal ruminations that accompanies it. It's a damn shame alcohol is so readily available; it worsens depression. Ironic that the Media almost never investigates the dangers of alcohol and caffeine and is so hell bent on investigating the dangers of marijuana ... SFM ...

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I am very sorry to hear about your uncle, it is never good to lose close relatives. I had an uncle that passed away a few years ago due to cancer so I can understand your sentiments.

If you have any kind of suicidal tendencies, just send me a PM and I find you a really well priced Zapco C2K 9.0, if you're interested in it? I have one myself and this a friends.

I understand very little about Mathematical equations but will just nod and pretend i understand :P

The part that I took particular interest in was your following quote:

Quote:

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Some information concerning the Thiele Small Parameters for the RE XX and XX v2 Series from Russell at RE Audio:

For anybody out there that happens to own an RE Audio XX 12 D4, RE Audio XX 12 D2, RE Audio XXv2 12 D4, and RE Audio XXv2 12 D2; employ the same Thiele Small Parameters of the XXX series for the XX transducers (i.e. Use RE Audio XXXv2 12 D4 T/S Parameters for a RE Audio XXv2 12 D4). Reason being; most of the structure topology is identical with the exception of the size of the magnet. Essentially, all-things-equal neglecting a difference in magnet size.

Optimum net internal volume is like the XXX 12's; V sub b is 2.25 cu.ft. I'll see what I can surmise with my PVC port idea in January. If need be I'll tune to 34 Hz which ain't that bad at all IMO.

Thank you very much, Russell.

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Basically, Jared designed me a kick ass enclosure for my 12 inch REA XXX (Version 4). This enclosure hit really low (28hz or so) and (iirc) only had a 3db roll off all the way up to 100hz so was extremely flat, which In my opinion is perfect.

I am telling you this because I have recently purchased a pair of 15 inch REA XXX V2 subs for my younger brother and nephew. I was wondering as per the above, if I am able to use the same enclosure design for the V2s as the V4? Bearing in mind the V2s are 15 inch and the V4 is 12 inch. The 15s will each have a separate enclosure.

If I have to make some corrections to the enclosure design, would you know what I would need to make as flat and as low as what Jared designed for me? I am thinking of asking Eric but I don't really want to bother him as he is a busy family man.

Any help would be greatly appreciated and I am still waiting for you to to install whatsapp or viber lol

Quote:

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Originally Posted by KirK

Not only did Robin Williams die yesterday; my Uncle Stevie Morey passed as well. My Uncle Steve was really gifted with carving and painting decoys. Before I began my elementary education way back in '89, I used to be OC with watching hummingbirds. My brother and I asked if he could paint some decoy hummingbirds my father had made. In the end, the decoys looked spot on and often confused the usual fair of Ruby Throated hummers that came to the feeder. But, I sorta had to abandon that instance of OCD from the 90's onward because of school. Nonetheless, I am thankful for having Uncle Stevie Morey in my life.:)

Having Asperger's, I can completely empathize with Williams bout with depression and the onslaught of suicidal ruminations that accompanies it. It's a damn shame alcohol is so readily available; it worsens depression. Ironic that the Media almost never investigates the dangers of alcohol and caffeine and is so hell bent on investigating the dangers of marijuana ... SFM ...

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I am very sorry to hear about your uncle, it is never good to lose close relatives. I had an uncle that passed away a few years ago due to cancer so I can understand your sentiments.

If you have any kind of suicidal tendencies, just send me a PM and I find you a really well priced Zapco C2K 9.0, if you're interested in it? I have one myself and this a friends.

I understand very little about Mathematical equations but will just nod and pretend i understand :P

The part that I took particular interest in was your following quote:

Quote:

---

Some information concerning the Thiele Small Parameters for the RE XX and XX v2 Series from Russell at RE Audio:

For anybody out there that happens to own an RE Audio XX 12 D4, RE Audio XX 12 D2, RE Audio XXv2 12 D4, and RE Audio XXv2 12 D2; employ the same Thiele Small Parameters of the XXX series for the XX transducers (i.e. Use RE Audio XXXv2 12 D4 T/S Parameters for a RE Audio XXv2 12 D4). Reason being; most of the structure topology is identical with the exception of the size of the magnet. Essentially, all-things-equal neglecting a difference in magnet size.

Optimum net internal volume is like the XXX 12's; V sub b is 2.25 cu.ft. I'll see what I can surmise with my PVC port idea in January. If need be I'll tune to 34 Hz which ain't that bad at all IMO.

Thank you very much, Russell.

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Basically, Jared designed me a kick ass enclosure for my V4 REA XXX. This enclosure hit really low (28hz or so) and (iirc) only had a 3db roll off all the way up to 100hz so was extremely flat, which In my opinion is perfect.

I am telling you this because I have recently purchased a pair of REA XXX V2 (i think) subs. (Definitely not the V4) for my younger brother and nephew. I was wondering as per the above, if I am able to use the same enclosure design for the V2s as the V4?

If I have to make some corrections to the enclosure design, would you know what I would need to make as flat and as low?

Any help would be greatly appreciated and I am still waiting for you to to install whatsapp or viber lol

Hey Nas; admittedly, I'm a little grey on the topic, in a metaphorical sense. Basically, thus far, I build enclosures around the net internal volume V sub b, and I try to make the half power and tuning frequencies close to the manufacturers, like my recent install for the 12W6v3-D4. I can email you the formulas I use for calculating the half power and tuning frequencies. Sorry about procrastinating with whatsapp; I've been busy studying for my Fundamentals of Engineering since August. I took a chance and took it without accommodations since my High Function Spectrum Autism diagnosis is 6 years old. NCEES requires the evals to be < 3 years old. As a matter of fact, I just took the FE last Friday, October 3rd. The damn timer distracted me on the screen when I was taking it; there was no way of hiding the timer. Failed, but I was expecting it. Nice thing, however, is my present psychiatrist is the very same person who had diagnosed me in 2008, so I'll get the evals updated in January, re-register, and fingers crossed, take the exam towards the end of January or February. To me, time always sucks on exams, it's just distracting.

Yeah, I spoke to Russell from REA; needed to know the T/S Params so I can begin using winISD. Russ said T/S Qts, VAS, etc are applicable from the XXX's to the XX's. Some exceptions are obviously Fs, Xmax, and some others. For the XX, Fs is 28 Hz and Xmax is 38 mm for the 12. In my intuition with T/S, larger net internal volume lowers the half power freq while longer vents (or ports) lower the tuning freq, but that's the extent of my T/S Engineering acumen, LOL!

My apologies with my math jargon, when I was younger I was certainly not the prodigious honor student, as a matter of fact I was in special ed up until the 5th grade. I thought arithmetic sucked but I liked algebra, trig, and calculus. As a matter of fact, I'm a paid tutor at my school. I tutor two other engineering students in the school's autism program; I usually can easily tutor them in Calc I and Calc II. I just had a knack for Calc. But my intense exposure to it in my prereq days often times clouds my judgement of how many others understand (or may not have the time to understand) it. 'If some lowly kid like me with autism fathoms it, why don't others' is the certain funk perception I fall into sometimes. But, based on my observations, people certainly have more important responsibilities they have to tend to in their lives, and the fact of the matter is, Calc is almost never used. In my junior and senior years alone, I was astounded with how little its used; going into it, I thought it was vital.

Thanks for your concern with my empathy with Robin Williams. My central deficiencies with my autism are in the areas of communication and socialization. I'll admit, my K through 12 experience straight up sucked, but I am pretty optimistic now that I'm close to graduation and can move back to Cali and take care of my father. As far as amps go, I appreciate you informing me about the C2K-9.0XD, Nas. But for now, I bought a JL 1200/1v3. My home theater is essentially going to be like a demo style car audio setup. Its expensive, but its a hobby, so I'm quite indifferent about it. Going to get a programmable AC/DC power supply sometime in 2015 or 2016 being the latest.

BTW, Nas, are you nas911 on Zapco forums? I happened to see newest member nas911 on September 11th sev weeks ago. Just figured I'd ask...

Take care Nas :)

On another topic, I finally was able to successfully upload the settings to my Zapco DC500.1. The 10 band PEQ is flat, I adjusted the input sensitivity up to about 45%, sorta the same place I had the gain set on the JLA 500/1, and have the polarity or phase reversed, or delayed in time by 180 degrees. I had the luxury beforehand of making that setting on my Eclipse CD 5030, and it just, empirically, 'sounded' better. Like I said in a previous post, the time delay is proportional to the phase value, -(180 deg)/w, but honestly I don't think I'll ever know the angular freq, w, in my life time, so that makes BOTH of us, Nas, LOL!:)

Well its gettin late, Imma clock out, LOL!:)

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Originally Posted by KirK

Hey Nas; admittedly, I'm a little grey on the topic, in a metaphorical sense. Basically, thus far, I build enclosures around the net internal volume V sub b, and I try to make the half power and tuning frequencies close to the manufacturers, like my recent install for the 12W6v3-D4. I can email you the formulas I use for calculating the half power and tuning frequencies.

Yeah, I spoke to Russell from REA; needed to know the T/S Params so I can begin using winISD. Russ said T/S Qts, VAS, etc are applicable from the XXX's to the XX's. Some exceptions are obviously Fs, Xmax, and some others. For the XX, Fs is 28 Hz and Xmax is 38 mm for the 12. In my intuition with T/S, larger net internal volume lowers the half power freq while longer vents (or ports) lower the tuning freq, but that's the extent of my T/S Engineering acumen, LOL!

I tutor two other engineering students in the school's autism program; I usually can easily tutor them in Calc I and Calc II.

My central deficiencies with my autism are in the areas of communication and socialization. I'll admit, my K through 12 experience straight up sucked, but I am pretty optimistic now that I'm close to graduation and can move back to Cali and take care of my father.


Take care Nas :)

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Hey kirk :)

I would be grateful if you could email me the formulas you use. Not sure if and how I can apply them but would be interesting none the less. I managed to get the T/S parameters for the V3 XXX, they are as follows,

XXX15
Fs 28.0 Hz
Re 1.9 DVC
Qms 4.68
Qes 0.55
Qts 0.49
Sd cm2 810
Vas 123.3 l
Xmax 1 way linear 32mm
BL 17.1
SPL 1W/1m 88.7
RMS 1600 W
Max 2500 W
Additional info:
Cutout 14 1/8"
Displacement 0.21 cuft
Mounting depth 9"
Weight 28 kilo

Would it be possible for Russell from RE to design me an enclosure for this? I was kind of hoping you would have the know how but to know someone from RE is a God send :).

As for your communication and socialistion skills, they seem fine to me. I work/support people that are high on the Autsim spectrum scale as well as people with multiple learning disabilities so I believe I can atleast partially relate to what kind of issues you may face. Good job on the tutoring though :)

I am trying to respond to you as quickly as possible without being late for work (story of my life lol) so I apologise for not being able to respond to all your post but I want to leave you a pic of my subs atm.

Attachment 580:thumbsup:

Would you by any chance know what the nomogram ratings are for these woofers or would you be able to contact Russell and ask him what the nomogram ratings are for the V3 and V4 xxx? I am trying to get my hands on the LEAP subwoofer enclosure design software, would love to play with that lol

Any help would be greatly appreciated.

Hey Nas,

Sent you an email.

I'll send you an email tomorrow with the half power and tuning frequency formulas. Civil engineers usually go to a scientific or engineering calculator with these types of formulas, whereas Mathematicians and Physicist will loftily approximate such formulas with McLarin Series representations. So us CE's are a bit down-to-earth as we'll use our engineering calculators.

Personal Recommendations for calculators:

Both formulas can be typed in as they appear with a Casio fx 115ES calculator. This has been the engineering veteran favorite for years, but I'm a Texas Instruments Guy. My personal favorite is the Texas Instruments TI-36XPro, which is still relatively new; it came out the beginning of 2013. I don't know if you can find such in the UK, but essentially you're looking for a calculator with 'mathprint' capability (i.e. stacked fraction input and output capability). My TI-89 Titanium only has mathprint output capability; nice calculator but the amount of parentheses I have to input to get P.E.M.D.A.S. to work can be quite tedious (entering (1/4) +(1/3) and all that crap ...)

I'll email Russ @ REA tomorrow; I've seen nomogram ratings applied in civil engineering. Basically, like the exact cut-out diameter for the front baffle, right?

I usually put my emails out to various manufacturers before the work week to counteract any uncertainty in the techs shifts scheduled days. I spoke to Mike from JLA earlier this year about an NBR surround being applied to the W7 in a version 2. Not surprising, the transducer engineers don't divulge all that much to the techs, logically to prevent mass public hysteria. However, Mike did say if a version 2 is to be made in the not so distant future, it would adopt the NBR like the W3v3 and W6v3 series. As a matter of fact, I had emailed Mike back in 2011 about W6v3's, but not surprisingly, the TE's didn't communicate those projects to the techs ... and then the version 3's debuted in 2012. I'm not surprised that the version 2 of the Fathoms still have the polyester foam surrounds. Foam does have some advantages over NBR and is likely to be the tried and true surround material for the home audio transducers (subwoofers).

'Kay, I will send some emails tomorrow. Nas, BTW, I think I have successfully downloaded the whatsapp on my LG (there's more details about the download in the email I sent you).

Take care Nas :)

Quote:

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Originally Posted by KirK

Hey Nas,

Sent you an email.

I'll email Russ @ REA tomorrow; I've seen nomogram ratings applied in civil engineering. Basically, like the exact cut-out diameter for the front baffle, right?

'Kay, I will send some emails tomorrow. Nas, BTW, I think I have successfully downloaded the whatsapp on my LG (there's more details about the download in the email I sent you).

Take care Nas :)

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Hey Kirk,

thanks for your Emails. I can say with certainty that your emails deserved a longer and more thought out response then what you received from me but hey, atleast I'm trying lol.

I actually have no idea what a nomogram or its rating is! Even CV got stuck on this one, it was at this point where he said something along the lines of forget all that, I will design something for you.

I look forward to you downloading whatsapp. If you download Viber, we can actually talk via voip :D

Anyway, i will assume what you have said about nomogram ratings is correct and eagerly look forward to what you and Russel have to say :)

Thank you,

Nas

Yeah ... what I was alluding to with nomogram ratings I believe came from a Hydraulics Engineering course I took a couple years back. Essentially, uhhm if I can remember ... there happened to be three gauges that had different graduations and ceilings (or maximums) ... I think we used a reading from the three gauges that happened to be selected in some increasing linear pattern ... F*ck I can't remember, LOL! Some bizarre homework problem, but this was like two years ago ... and it was in a Civil context not an Electrical or Transducer Engineering context.:) But, we had a VERY brief exposure to nomograms nonetheless. Hell, I'm not going into Hydraulics or Hydrology anyway so its no prob. Could be a blessing I failed the FE; I don't like the fact that I would have a metaphorical Liability cloud hanging over my head everywhere I went if I hypothetically pursued something like Structural Engineering. Ironic, the dumb bureaucrats like the politicians and economists that would hypothetically be constraining my resources (like TIME) would walk away from some structure failure / disaster attributing not so much as an ounce of liability and that liability would 100% be on me, the PE (Professional Engineer). A psychologist would call that a rather distorted perception, but to me its like the old cliche', 'an ounce of prevention is worth a pound in cure'. I get a BSE this December so its generalized engineering with a subtitle 'with Civil Engineering Emphasis'. Hell, I could go into an Exec position for a utility since my degree would be that versatile. Maybe, I could even consider Mechanical; I loved all the ME courses I took. Too many dumb exams in engineering, LOL! Ahh ... damn I'm digressing!:)

I know there's a book a lot of novices (like me!) in loudspeaker enclosure design can benefit from. It's been around for ages;

Vance Dickason's The Loudspeaker Design Cookbook

Personally, I would love to get my hands on a copy after I graduate in December. The Golden Ratio is used preliminarily to obtain some general panel dimensions to avoid panel resonance. But, that rule of thumb is not always necessary if you're doubling up on 0.75 inch thickness, which is what my plans are for my XX12 v2 D4.

Probably sticking with what Russ told me to keep things within reasonable size and weight; f sub b 34 Hz and big V sub b 2.25 cu. ft. If it's over 150 lbs I'm undoubtedly going to get a hyrneated disk. I'm 6', ideally I should be 200 lbs, but thanks to ABET (specifically my junior and senior years in engineering) I'm a hefty 275 lb, gosh I'm shaking my head, LOL! Going to be doing plenty of hiking and mountain biking once I graduate 'cause right now its either immersion in study or burnout recovery over winter and summer breaks that keeps my rec activities low. School was just crazy the past couple of years; lab reports that would pass as a Master thesis or Dissertation in sheer volume (the freaking report paper thickness) of the final report. Those dumb CE Materials and Geotech courses were the two culprits, LOL!

Take care Nas :)

Since my audi is about to hit 150k mi; time for me to plan ahead. Instead of dropping $3k on a AC/DC power supply, this January I'm picking up a Behringer iNuke NU3000DSP for my REA XX v2 12 D4. I'll wire the VC's in series for 8 omegas (ohms ... LOL!).

I'm glad I have the JLA 1200/1v3 handy for the meantime; I'll use it with a W7v2 in my next car. Since my school's near Ohio, I figured I'd save some $ and get some 1/0 AWG P/G and 8 AWG SW from KnuKonceptz in Windham; it is all about supporting the current. Saved big time $ on the 1/0 AWG.:)

As for other woofers in my theater, I'll eventually purchase a NU1000DSP for the other W7v2 I'll use in the theater. I'll just have to make sure the DMM reads 54.8 V AC for that setup..

Quite acclimated with winISD; settled on 2.7 cu. ft net internal (after displacements) for the REA XX tuned to 20 Hz. I'm no where near Xmax which is good for the longevity of the woofer (more like 55 to 60% of the Xmax, 38 mm). Not surprising, when I had asked Mike about my ported enclosure ideas he stated that the LFE would be better, but the peak will be attenuated compared to other designs. My design has a max spl of 112 dB at 20 Hz, which is awesome enough for me; the cone excursion peaks to 22 mm at 32 Hz with my design. Is it a good design? No, its subjective and relative to my tastes; I would just favor better LFE with movies even if it came at the expense of output. My reasoning on 2.7 cu ft is the Equivalent Air Compliance Vas is 2.61 cu ft for the REA XX. My dad's saw is great, but being precise down to the one hundredths of a decimal is something that most table saws can't accomplish.

Nas, I forwarded you my correspondence with Russell Anthon thus far. Because its an older version of the XXX he needs to talk to corporate for implementing a design.

Well, saving some $ now for myself will help me in getting another Audi in the next 2 years.:)

Sh*t; knew it had to be too good to be true.

Lately, Behringer gives peak power's for their PA's. I saw some discussions in other forums that the listed power divided by 1.414 is the Root Mean Square, which makes sense since I've seen that formula in my circuits class. Not really all too enthralled with most of the power amps I've seen. Guess I'll stick with my power supply idea and obtain a TDK Genesys sometime next year. Hey, I only hated the area I grew up in New Jersey; not the whole state. I'll be glad to pay some homage to Neptune.:cool:

Got a nice ported alignment ready from winISD. 2.5 cu. ft after displacements, 18 Hz tuning freq, and 22 Hz half power freq. ~112 dB @ 20 Hz, Xmax is 25 mm @ 27 Hz. Going to be heavy as f#@k but its gonna be our own personal Imax. Another bonus, lots of good movies released next year.

As far as a big system for my next car, I think I'm gonna pass. While it would be nice to get a custom job alternator, that's literally money lost at resale so I'm inclined to keep the high power stuff in the RV with a power supply. I'll just keep my current set up now for my next car so I can avoid electrical upgrades.

At this point, if my next ride has 50k to 60k mi on it, that's fine. I'll probably pick up the ride before getting a high power Zap. I'm intereted in seeing if Zap does a 3rd Gen with the DC's. I'm not entirely clear if the DC's phase is adjustable in 45 degree steps and the Z8 is adjustable in 15 degree steps. It'd be nice if a 3rd Gen DC had continuously variable phase. That'd be legit; I'd legitimately be all about that bass, LOL!:)

Like I said in the beginning; this is going to be a long @$$ project, LOL!:)

Nas, my apologies for the delay in the correspondence I had with Russell; I'll just keep checking emails to see if he responds back.

There's too much interference from the charger on the battery with the temp setup; taking it back to Wal-Mart tomorrow. I'll save some $ for the next couple months and get the power supply. In the meantime, I can put the REA XX and the JL 1200/1v3 in my car; just got to power down everything if its raining or dark out, one lil' caveat, LOL. Works good when the clamps are not on the battery, though.:p

REA XX v2 12 D4 ported wedge is done; 2.7 cu. ft, Fb is 23.4 Hz, & F3 is 22 Hz. Not the loudest ported alignment; only 1.5 dB gain @ 29 Hz, but good for longevity of the suspensions. Put on a gasket around the circumference of the cut out, dropped the 59 lb beast in, but my middle finger got stuck between the cut out and the mounting flange. Fortunately, my father was working on a poor ground connection in my car. Together we managed to haphazardly hoist it off. Didn't scratch up anything; the NBR is pretty resilient stuff. Woulda been devastating to lose my middle finger; it's so useful when I am f*cking with tailgaters when I'm driving, LOL!:)

Another thing occurred to me ... Bass I Love You is on my USB drive.. I had my infrasonic set to 25 Hz. My XX v2 was not going crazy with the super low flatulence in the song. Those people that upload 'Bass I Love You' Sub Porn have NO concept of setting their subsonics or infrasonics, LOL. Wow ... ironic, since those individuals will readily Google something to 'one-up' their teachers, professors, or parents whenever the latter tries to educate them on something. How f#cking hard is it to type subsonic filter in Google? LMAO.:p

It's late, I'll upload some images tomorrow; vids are out of the question. I've got crappy WiFi service for now so uploading will take forever.

Peace

Here's some night shots; the images were better during the night.

Wouldn't be surprised if the maintenance periods reduce them to pixel again; no problem. Didn't take too many images this time, anyway. I can easily upload them again if the aforementioned transpires.

This will be in my car until I pick up the TDK. Right now, got some employment agencies helping my job search. Also, I am on Monster constantly applying to CE and ME openings.

I was expecting this thing to be 150 lbs+, but it's actually 142 lbs. In other words, it weighs one Nikola Tesla. Coincidence?:rolleyes:

Wow Kirk, that looks amazing! I really wish i could hear it in person.

Easy E's looks good too. I'm dying to install something in my car but it's suffering from water leaking into the cabin and has allsorts of condensation and water logging issues (not nice).

What are you doing for the front end? Do you already have components in mind/fitted or is that a possibility in the near future?

Once again, a big well done!

Well Nas, I can make that happen. Within the next year, I'll buy a everyday type Canon video cam from Crutchfield. I've been thinking, it would certainly nice for you to be able to hear my installs, so I'll honor what I said earlier. The YouTube channel might be up towards the end of this year or sometime next year. Although, comments disabled, LOL. Need to put my ASD OC's toward my job, math, and my hobbies; you understand that, LOL. I mean in school I would take frequent internet browsing breaks from burn out in my assignments, but anymore it just seems I'm killing brain cells in front of the monitor, LOL. Don't need to react to comments.:)

In North America, we're starting to see low freq mics become more abundant, so that could be some future purchase down the road for the channel. Don't know when, but the video cam is a MUST, NASA has predicted a solar eclipse visible in North America in 2017. I would like to see what I can find in the way of sun filters by then.

My Audi's pushing 150k mi; after my first year of work, I'll be scoping out Lexus and Infiniti. Used, 40 to 50k mi, 10,000 to 15,000 USD is fine. Not so sure with more upgrades with the Audi. Also not sure if I can install my Eclipse CD 5030 in the next car or be at the mercy of factory integration. Nonetheless, I would rather wait and improve the mids and highs in the next car.

Cynthia, who typed up my resume has been an invaluable resource for notification of job fairs in the Diego area. We're looking at managerial positions with new transit projects in the area. In the meantime, I've gone through 12 sections in my FE Practice Manual, so I will register for the FE again in April or May; slowly but surely, LOL. Once I pass, I'm eligible for the license. Wish I knew about the practice manual last summer, but I was using the time to recover from the Spring '14 semester. College wasn't so easy for a 29 year old with wrong sleeping meds and chronic insomnia (thanks to Calculus), LOL, me.

I've got about 5k USD set aside so when we get a lot in another park with 240 VAC service, I can pick up the power supply for the demo room. I don't recommend buying one, its cost is similar to a used car. I'm looking at the TDK Genesys 15-220, its programmable which is a plus. I'm obsessive compulsive from my ASD, I just think it would be neat to have a demo room in the RV, LOL. Practical for me is NOT practical for the next person, LOL. The specs are good; eta efficiency is 84% and the 230 VAC single phase power factor pF is 0.99, no line losses. 0 to 15 VDC and 0 to 220 A is nice for a couple of 1 kW class D's for some occasions; I know, I'm quite mad, LOL.

Anyway, Nas, sorry for the mini dissertation here. I'll keep you posted.:)

Quote:

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Originally Posted by nastynas

Easy E's looks good too. I'm dying to install something in my car but it's suffering from water leaking into the cabin and has allsorts of condensation and water logging issues (not nice).

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I had the same thing happen with my '95 Buick Regal back in 2003. Long story short, inherited it from my grandmom. Was in San Diego; my dad drove it back to NJ with a friend of his. Anyway, tree fell on it in a parking lot while she was in church. Another incident, she mistaken the accelerator as the brakes and drove it through a post office.

My aunt and uncle on my father's side of the family helped grandmom with the repairs, but they're the biggest cheap skates in the world. Repairs were somewhat on the shoddy side. The gasket didn't form a good seal around the back window, and water had a direct passage to the trunk. Fortunately, all I had at the time was a cheapy q-logic bandpass with two twelve inch sony aluminum Xplods in it. The amp was a nightmare to take care of, some 2002 volfenhag class ab, 320 W RMS x 2, with black chrome that stained hella nasty. My budget highschool system with the help of some of my paychecks from Pathmark; what a crappy place to work, LOL. Anyway, bought some clear silicone and sealed the leak in the gasket; problem solved.

In a word; my aunt's concern of my grandmom's welfare: SSA
The shoddy gasket work for the rear window: 0.5OOed, hahaha.

Timed exams do more harm than good; like the FE exams. Amen Professor Boaler.:)

http://www.freep.com/story/life/2015...ills/70298482/

So ... Here's an image of the Audio Control line driver, distribution block, circuit breaker, and Knu Konceptz wire I bought last year.

Attachment 606

20 ft of 1/0 gauge Kolossus Fleks Kable and 20 ft of 8 gauge subwoofer wire. Probably bought too much 1/0 for my application, but too much is better than not enough.

Looks like I have a green light for picking up the power supply at the end of the month. I have been encouraged to apply for an Industrial Hygienist opening; it looks pretty promising, but I won't really know anything until next week. At any rate, Cynthia has said recruiting for the transit project will start in June. I communicated a slight delay in employment to my loan servicer, but they're willing to work with me as I have every intention of paying those student loans back.

I keep forgetting phase is time delay; I really had to do the math to convince myself. The Zapco DC-1101 will be perfect for the REA XXv2; I like the fact that it has two channels for easy parallel connections. Probably won't need to use the time delay, but it would be nice to cut and apply low Quality for the 40 Hz spectrum to remedy any resonance issues from the door to the mobile home. I'll keep the JLA 1200/1v3 for the W7 version 2 whenever it debuts and gets released.

So I'm going to order the power supply tomorrow. It will be nice to have in the mean time as it will be critical for my system. Probably will take several weeks to arrive in lieu of the manufacturing and shipping, but I'm excited nonetheless.:)

Hopefully, I should have some of the equipment functional by the time Straight Outta Compton gets released to video (October or November). I'm not entirely sure if I'll have the Polk floor standers by then; we'll see...

My sentiments exactly Morgan Freeman.

https://celebrity.yahoo.com/news/mor...142223417.html

Nas, I think I am going to withdraw from my decision to make a facebook account. Likely, I won't start up a YouTube channel either, but I'll make sure I can send you some videos when the system is all done.

The other day I see an article calling one mother of a rioter 'Mom of the Year' and 'Hero-Mom' on Twitter and other stupid networks. I'm sorry but I just refuse to blend in with sheeple that don't want to acknowledge the bigotry and brutality that are attributable to so many corrupt police departments. My brother Scott and I were harassed by police officers when we were growing up; particularly me because of my autism and being a vocal critic of the police. The only thing wrong I see with the riots is that they seemed to be randomized. If their riots were more directional as in targeting the officers responsible, I would commend their efforts.

My first school friend was Anthony, an African American. He is a far more sophisticated person than I am, he would very well handle this more peacefully than me. African American Lives matter! I wish so many of these f*cking people can pull their head out of the sand and ascertain just how morally corrupt and subconsciously racist they truly are. Anthony moved out of town in 1991, which was a very intelligent decision on his parents part. So many people in my home town in southern New Jersey were these antisemitic, racist individuals who also seemed to have an extreme prejudice toward autistic people like myself. I never befriended anybody like Anthony afterward. In chronological order, a hoity-toity honor student, some users, and some goofs that inevitably became enamored with control freaks pretty much comprised subsequent acquaintances.

Anyway, end rant.:)

So the power supply is here.. I'll upload two images tomorrow.

I have some good leads for government work from Cynthia; perhaps in the next two months I should be working. Also had just thought of vo rehab in the middle of April for help in employment since I have Asperger's. Shoulda thought of going to vo rehab sooner, but oh well ... Always a first time for everything :rolleyes:, LOL..

So here's some front and rear isometric views of the unit.

Turns out the ported wedge's output is MASSIVE. It occurred to me that when I was testing the system in my car, I still had a poor ground that was hindering its output. I recently made a temp setup in the RV for one minute and used one of the RV batteries. I needed a good bass tester and had my Eminem Show CD in the front of the RV. I just ran the power and ground to the engine compartment through an access in the floor. I didn't even make it past Business because it was pretty intense even at low volumes. The REA XX v2 seems VERY happy with 1 kW to 1.2 kW. However, I had undersized the port area with the net int volume in an attempt to get a low tuning frequency. Later this year in the fall when the temps are no longer in the triple digits, I'm going to take a heat gun and flare the ends of the port and see if that improves anything. If not, I'll put a 4 inch square slot in there and re-tune to 33 Hz to get more port area. A minor fix really, but the output is seriously impressive :).

The unit is programmable up to 220A so I could put a Zap C2K-9.0XD on it if I wanted, but I don't think I'll ever need that much power, LOL :).

Here's a group pic of all the electronics collected: TDK GEN 15-220, REA XXv2 12 D4, & JLA 1200/1v3; pretty nice pic.:)

http://forums.carreview.com/attachme...9&d=1437589587


I passed the FE; I studied like the Dickens for it for months, but I still have a slew of apps to fill out for the subsequent certificate. Hey I broke 300 posts, I guess that would mean something if I was bowling, LOL.

Uggh!!! No 5 inch PVC in the schedule 40. Mother f*cker $%^& *@!#$ //<>>||{}[]\=+-!!

No prob, KERFING TO THE RESCUE!! I'm gonna kerf some mahogany and make myself a 5 inch ID port for my REA XX wedge. I'll kerf two more pieces for the ends, concentrically, to form the flares. 2.7 cubes and 19 sq. in. of area, bingo!:) Naturally people can't manufacture 5 inch ID but readily manufacture 3 inch ID, damn that's practical factorial, LOL.

As for the W7v2, if I want to use a wedge I really need something like 2.1 to 2.4 cu. ft regardless of recommendations. I'll see what I can come up with in WinISD based on the W7AE parameters. Would like to use a 4 inch ID aero, but if I have to settle on 2.3 cubes I guess I'll have more kerfing to do. No prob on the craftsman 21829.:)

Quote:

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Originally Posted by KirK

Here's a group pic of all the electronics collected: TDK GEN 15-220, REA XXv2 12 D4, & JLA 1200/1v3; pretty nice pic.:)

http://forums.carreview.com/attachme...9&d=1437589587


I passed the FE; I studied like the Dickens for it for months, but I still have a slew of apps to fill out for the subsequent certificate. Hey I broke 300 posts, I guess that would mean something if I was bowling, LOL.

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Pure Audio Porn

If you are ever interested in using power supply units, there are units a lot cheaper than mine that work great. Look at the voltage ripple RMS as this is what usually manifests itself in the audio bandwidth. The voltage from the AC mains is sinusoidal; capacitors suppress the amplitude of the sine leading to less audible hum. The hum is a periodic residual from the AC mains. You'll be in business if you can find one that's 100 to 150 milliVolts noise and ripple. The power supply units for the old desk top computers pack a wallop. I saw a video of barevid's in the UK using a 175A unit to power a big amp and a Digital Designs subwoofer. Some of the manufacturers that are still around are Astron, Pyramid, ATX, etc; just Google DC power supply or car audio power supply. Circuit City, in the states, used several 100A Audio Authority units, but I'm not sure if Audio Authority is around anymore. In the states, Dereck BigDWiz has a programmable 18VDC/250ADC linear. There's two basic types: linear and switch mode. Linear usually has less than (<) 5 mV ripple, but one disadvantage is they create a lot of heat (they aren't efficient), creating a heat source as we call in thermodynamics. Plus, linear supplies have big transformers and are considerably heavier than switch modes. The switch mode doesn't create all that much heat (they're pretty efficient), lightweight (mine's 36 lbs), but usually have problems with noise and ripple if there is not adequate capacitance at each stage of the power supply. Yep, capacitors are actually useful for something, LOL. Car audio amplifiers and PC power supplies are examples of switch modes. Hence, the presence of capacitors.

I wanted an advanced switch mode to begin with; I had a big budget. The TDK 15-220 has 8 mV ripple with 60 mV noise & ripple peak-to-peak. For residential, you're looking at single phase. In the states a lot of the lower ampacity units are 120VAC, but mine is 240VAC to get to the 220A DC, so I have to install a 30A fuse/circuit breaker. Also, I'm going to buy a 240VAC surge protector to protect my unit given SoCal's Jurassic Park style wild ass storms. **Sigh**. In retrospect, I wish I pursued electrical engineering, but I did not make that realization until my junior year. By then, my student loans were starting to accumulate, they're so effing outrageous in my country, and I had just decided to stick to civil.

I had applied for my Engineer-In-Training certificate a few weeks ago. Unbeknowns to me, in some states it takes 3 months for the certificate to be issued. But, in the mean time I have electronic pdf proof that I passed the Fundamentals exam. I have applied to some transportation engineering places with that new piece of evidence, so now it's just waiting out the meandering applications submission process, LOL.

I've been so bored lately, I started writing a book. I titled it An Asperger's Individual's Manifesto. Instead of chapters it has pet peeves some of us with Asperger's have in common. The first peeve is about Superficiality and our hatred of it; it's public enemy numero uno for our pet peeves. The last chapter I entitled, The Entropy (Chaos) of the Universe Only Increases. In a nutshell it's basically a free-for-all peeve, but it also encapsulates our discontent for people who are ignoring the signs of global warming. Alternating Current has been in static limbo ever since the passing of Tesla. I explore the possibility that J. P. Morgan and our federal government had an arrangement to confiscate Tesla's blueprints to ensure the prosperity of Morgan's descendants' by receiving a revenue-percentage from the electric utilities. Alas, the perpetual wires and the elusiveness of the Tesla Coil and Tesla's radical idea to transmit alternating current via air by such coils and towers. Never again in history would such inventiveness dominate in EE and we are making that ozone hole bigger over Antarctica. In centuries, UV could be bad enough in places like South America where sun blocking umbrella's and vitamin D supplements would be necessary. LOL, Preview-Of-Coming Attractions, not to go off on a tangent or anything. I might publish it when I retire from CE, LOL, I don't know if the Fed's would like my conjectures.:)

Well it always winds up being a dissertation. L8er Nas.:)

Umm, also Nas, I'm on LinkedIN. I haven't got around to posting a dumb selfie image yet for my profile, LOL. But I'll make sure to upload one once I locate my login credentials. I'll send you a link once I successfully upload the image.:thumbsup:

LOL! All Lives Matter?! LMMFAO.:lol:

https://cdn1.vox-cdn.com/thumbor/Lqp...%20cartoon.png

Gotta good design going in WinISD; 6 cubes wedge, dual twelves, ported, compound chamber tuned to 27 Hz based on the 12W7AE-3's parameters. 7.5 dB gain at 29 Hz on the transfer function magnitude; good bump from the mid 20s to the mid 30s and flat the rest of the way. The nitrile butyl rubber surrounds on the version 2's would likely affect the Thiele Smalls params, but this design is a good place to start.:cool:

Hey Nas, just as an after thought, the ripple voltage wouldn't matter tremendously should you ever decide to go this route. I happened to think, the objective of the dc power supply is to take the mains 120V down to an automotive voltage. I tended to get distracted by some of the discussions in other forums about ripple. So, like, the guys that have the CB Ham Radios that have no internal power supplies in their units, the ripple would be important. As it is, car amps have their own DC/AC and DC/DC converters with plenty of capacitance. I'm no EE, I really don't know what the audibility threshold is with ripple, but I imagine with an external psu powering an amp with its own psu inside, I guess it could be relatively high. Its kinda consistent with what Easy E and CV have educated us on; power is power. For instance, some people have OCD worse than me (LOL!) and actually believe a ripple down into the microVolts makes a 'discernible' difference in sound compared to a mlliVolt ripple (if their psu has a D/A converter). What bless-ed golden ears, right? My Eclipse HU does not have a D/A converter and sounds perfectly fine as far as I'm concerned. Come to think of it, my temporary charger/battery setup just had ground loop noise, but I figured it just was not practical to use it on a 1200 W amp.

I hear ya with the school in the email you sent me. School can certainly be a b*tch sometimes, LOL. As a matter of fact, there seems to be this tremendous disagreement between what employers value as significant qualifications and what schools value as significant qualifications for employment. Guess that's what happens when morons are in control of countries like ours, LOL. And then there's organizations like Autism Speaks that don't do sh*t for adults on the autism spectrum as far as employment is concerned. LOL, oh well.:)

Nas, whenever you move into a bigger place, I'll definitely be of service to you should you ever go the PSU route. L8er man.:cool:

Hell yeah! Got my first interview this week; it's federal so the benefits are superb.:)

I have to laugh at some of the other employers, though, like CalTrans. They prefer experience and wind up hiring asinine degenerates that play golf on company time. Really, who the f*ck are these employers kidding? LOL.:lol:

Nas, I had forgot a conversation I had with John Borge over at Zap. John uses a CAE APS 75 for his demo room; the acronym is Cascade Audio Engineering. My bad for not posting that sooner, but anything with John's stamp of approval is helluva good. When you start going beyond the 55 A DC supplies its always best to use a 20A branch, or make its own circuit back to the main panel. Later on, if you ever wanna try a psu, I can walk you through the process; its not differential geometry, LOL. My father has been an electrician for years so I have a lot of his advice, guidance, and experience with the empirical aspects. Don't be discouraged by discussions that suggest using a psu is dangerous. Those people, often times, don't know wtf they're doing, like running thin-gauge wire from the panel to the psu or drastically exceeding the psu's ampacity with no fusing on the load side.

I contemplated getting the CAE APS 100, but it isn't a model that's dual voltage capable. So I couldn't take the ceiling up to 14.2VDC if I wanted to run an unregulated amp. Plus, with the unit I wound up getting I can set it to Constant Voltage (CV) and the current adjusts with the load, which is pretty nice.:cool: Later on, when I get a house, I'll pick up a 10F cap to handle the transients if I ever decide to run two big 1 kW amps.

Quote:

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Originally Posted by KirK

Umm, also Nas, I'm on LinkedIN. I haven't got around to posting a dumb selfie image yet for my profile, LOL. But I'll make sure to upload one once I locate my login credentials. I'll send you a link once I successfully upload the image.:thumbsup:

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I saw it from your Email thanks. Nice to finally put a face to the name :)

Quote:

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Originally Posted by KirK

Hey Nas, just as an after thought, the ripple voltage wouldn't matter tremendously should you ever decide to go this route. I happened to think, the objective of the dc power supply is to take the mains 120V down to an automotive voltage...

I hear ya with the school in the email you sent me. School can certainly be a b*tch sometimes, LOL. As a matter of fact, there seems to be this tremendous disagreement between what employers value as significant qualifications and what schools value as significant qualifications for employment. Guess that's what happens when morons are in control of countries like ours, LOL. And then there's organizations like Autism Speaks that don't do sh*t for adults on the autism spectrum as far as employment is concerned. LOL, oh well.:)

Nas, whenever you move into a bigger place, I'll definitely be of service to you should you ever go the PSU route. L8er man.:cool:

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I wasn't at first but after reading your posts again (when I'm not shattered from work), they make much more sense and you have converted me lol. I am not sure when I move but when I do, I will more then certainly bugging you about how to run my car audio in my house. In fact, it should sound really good and I don't even like too much bass anymore.

Seeing as you have access to vastly experienced electrician, I was wondering what (if any) would be the difference between between using a power supply in the UK as opposed to the U.S? Would everything still work the same? Knowing my luck...

There is a lot of support her for people with varied learning disabilities including Aspergers and Autism in general. I personally try my best to support people and I am even thinking of volunteering in a day centre for people with Autism and Asperbers but life is getting in the way yet.

Also, thank God my diploma is finished. It was so boring and long winded lol. I Emailed you around a month ago with an update about my install but I am assuming you have been busy and not had time to check/respond to it yet. Or you couldn't be bothered :p

Anyway, always nice speaking to you. Let me know how your job interview/job comes along.

Nas.

Hey Nas, yeah we have 240VAC in the states. But let's say if you were 208VAC in the UK; you could still run 120VAC equipment off of 208. A Cascade would be perfectly fine for mids and highs. It's just when you're up into 55A DC, it's usually a good idea to use a 20A branch. The common deterrent with running converters is they're not an efficient use of AC, but those who argue that really don't understand Diversity. 'Diversity' meaning the current is not constantly flowing like in the case for refrigerators or air conditioning. Am I going to be watching TV, movies, and listening to music for 12+ hours a day? No, so why have that as a contention. Besides, even with transients in music, I would be using, at most, 50A (DC) ---> 5A (AC), for the volumes I would be listening to from my car audio equipment, and all those are just peaks and instantaneous burst.

I was really hoping I could find something suitable in pro audio amps, but, TBPH, I wasn't impressed. Among the stumbling blocks with the amps I researched included bridged stability only down to 4 Ohms (not good for unusual impedance), lack of subsonic filters (def not good for ported alignments), and retrograde power rating methods. XYZ W RMS @ 1 kHz; seriously? The 1980s called, they want their power rating method back, LOL. About the only closest thing I could find was Behringer, but there's talk on other forums that the RMS they post isn't necessarily RMS over a bandwidth (again, the retrograde 1 kHz testing...). Plus, much of the technical data is not displayed on their website adding a great deal of ambiguity as to what their units can actually do. Ehh... I'm ranting..:cryin:

Yeah, stick with Cascade. The guy in barevids uses the old beefy Dell desktop psu's; they're pretty good for what they are. I was on Youtube looking for a vid with some equipment being powered by an industrial SMPS like mine. To my surprise, I found one where a guy was using an old TDK SCR 20-500 (3 phase; prob) powering a Cadance 7 kW RMS amp and a 15. Nice and quiet, not the slightest hint of voltage ripple. The Genesys replaced the SCR.

I'm actually waiting on a background check for the federal job I mentioned. Looks like I pretty much have the job at this point; just need a fix on the start date. A lot of my run-ins with LEOs happened when I was a lot younger, and I'll tell ya, being the kid with Aspergers was pretty much like being in a minority. Although, I can't say that I can comprehend even one, one trillionth of what Africans had endured for centuries; I've seen some pretty corrupt sh*t from the men in blue, so I share their disgust in the system. I'm not saying police are useless, but there's such a vast room for improvement in the system in the states. And as far as my driving record is concerned ... very clean. I'm part of the 0.00000001% of Americans that drives the speed limit and obey basic traffic rules everywhere I go. Tends to p*ss people off, but, hey, guess that's why my cars last long and theirs don't. Uggh!!! :cryin: Gone off on a tangent, and it's 12:39AM; guess I'll post something tomorrow. L8er Nas.

[QUOTE/]I wasn't at first but after reading your posts again (when I'm not shattered from work), they make much more sense and you have converted me lol. I am not sure when I move but when I do, I will more then certainly bugging you about how to run my car audio in my house. In fact, it should sound really good and I don't even like too much bass anymore.

Also, thank God my diploma is finished. It was so boring and long winded lol. I Emailed you around a month ago with an update about my install but I am assuming you have been busy and not had time to check/respond to it yet. Or you couldn't be bothered :p

Anyway, always nice speaking to you. Let me know how your job interview/job comes along.

Nas.[/QUOTE]

Yep, I read your email Nas. My sister was in an apartment for 10 years; her neighbors would give Scott and I a ration of sh*t just by simply running around her apartment. Now she has a townhouse. Good thing she never really had an affinity for bass like I have. A lot of the stuff she listens to is devoid of bass, like Bon Jovi, LOL. Waa Waa Waa Woww Woww, LMAO.

Gosh, this thread could potentially grow to 10 pages, LOL. If the W7v2 has a new patent like the W6v3, I'm guessing this project would get finished February 2017. 'Spring quarter 2016 becomes Winter quarter 2017', LOL, patent pendings.

So looks like we can build the 230VAC circuit in mid to late December and have the power supply on a dedicated 240. I should be able to upload vids either at the end of the month or next year. Against better judgement, I'll start a Youtube, but I'm not going to go crazy @ss stupid preoccupied with it. I'll upload some vids; no f*cking comments of course...

Also I'm going to pick up some Precision Sound aeros' at Parts Express for my REson8er Wedge and Phantom Wedge sometime soon. The RV needs some repair work first; priorities.:)

Quote:

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Originally Posted by KirK

The voltage from the AC mains is sinusoidal

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Ahh, what the hell; it merits explanation, LOL.

A few centuries ago, John Bernoulli stumbled upon a mysterious relation between an imaginary number and a complex logarithm after dispensing his partial fraction decomposition and subsequent integration. There’s no historical record of such, but chances are he may have wanted to determine some instantaneous quantity such as a displacement of a spring. I could never commit the exact timeframe to memory, but this discovery may be concurrent, in time, to Joules discovery of energy, adding to the list of possible instantaneous quantities Bernoulli may have been hunting. Subsequent mathematicians took the rectangular form from the complex logarithm’s argument and transformed it to a polar form. However, the relation wasn’t meaningful and no practical solution to the hypothetical application could be arrived at. Further exacerbating the relation is that a complex logarithm is not unique; it has infinitely many solutions as the function is coterminal like the sinusoids are. That is, its projection on the complex plane is the unit circle; take a ratio at an arbitrary angle, advance 360 degrees or 6.28 radians, you then end up with the same ratio. In complex space, a complex logarithm forms a gradually nondecreasing, monotonic helix.

Euler, intuitively hypothesized that perhaps the inverse relation would contrive a path to a meaningful set of solutions inasmuch as its power series is globally convergent. But being the formal man he was, he took the MacLaurin series of this inverse (2.713 or natural base e) and coupled it with a special case of De Moivre’s Theorem to generate the powers of the imaginary unit. From basic complex number definitions and limits, it can be shown that the cosine and sine argument is 0.5*3.14*n in this case where n is zero and the set of all positive integers, Z+. Subsequent expansion and associativity of the even and odd exponentials and factorials lead to what is known today as Euler’s Formula. The sine series reflects the fact that the function is odd whereas the cosine series reflects the fact that it’s an even function.

Armed with his formula, he tackled a second order differential equation that has complex conjugate solutions in the form of the aforementioned natural exponential function. Again, they aren’t meaningful because they’re complex. Euler realized he could transform the complex conjugates to real conjugates via his formula bearing in mind that each real solution constitutes half of the full solution and that each linear combination formed by the system of Euler equations (using one negative argument and one positive argument for the cosine and sine) constitutes a new solution because of the preservation of the conjugates. One solution will be intrinsically real while the other will be intrinsically imaginary, but when the math is done they both turn out real in the end based on the properties of the imaginary unit. The fact that the sines have amplitudes is a consequence of the Wronskian determinant of the solutions. For the solutions to be linearly independent, the Wronskian determinant must be nonzero. By inspection, the determinant of solutions forms the sine Pythagorean identity, which is, indeed, nonzero.

One interesting thing to note is he first applied this to a table leg he treated as a slender column. The deflection at buckling is a sinusoid and he proceeded to derive yet another formula … Euler’s Buckling Load Formula for columns. The applications of all of the aforementioned development are abundant: vibrations, wave mechanics, alternating current, probabilistic quantum mechanics … United States speed patterns in traffic, LMAO. I remember a Project Management course I took my senior year. Just about everybody fell asleep in the class whereas I would keep myself awake by deriving theorems like Euler’s Formula, 1st and 2nd FTC, the dif MVT, the integral MVT, trig identities, etc. LOL, kept me awake.:)

Quote:

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Originally Posted by KirK

Further exacerbating the relation is that a complex logarithm is not unique; it has infinitely many solutions as the function is coterminal like the sinusoids are. That is, its projection on the complex plane is the unit circle; take a ratio at an arbitrary angle, advance 360 degrees or 6.28 radians, you then end up with the same ratio. In complex space, a complex logarithm forms a gradually nondecreasing, monotonic helix.

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Well, I guess I get an E for Effort, right Nas, LOL? I was in Differential Equations when I read some online journals and articles about complex logarithms; that was WAY back, in 2009. Needless to say, I had forgot some things about complex logs. We didn't have to study them for dif eq, but I read those articles out of my own curiosity. I read up on it about a day ago. To set things straight, I believe the complex natural exponential is the one that's coterminal. So it's not invertible, making a complex log defined only over a restrictive domain or piece, sorta like how the inverse sines are defined. To resolve some of the invertibility issues, one could puncture the complex plane forming a Riemann surface that looks helical. I guess somehow, years later, in my mind I remembered the surface as a helix. Jeez, I'm 31 and I am already having Senior Moments. Damn, I guess that's what STEM does to some people like me on the spectrum. After I study and pass my PE exam, I'd like to pick up where I left off with math. But, I'd rather be self taught; my mind can't process advanced math fast enough for most curriculum's.

Blahh, anyway putting the math off to the side now. I picked up all the components for the 240VAC circuit today; 8/2 wire (50 ft), 30A breaker, and an enclosure for the breaker. The 240VAC surge protector was a little bit more expensive than I thought so I'll pick that up in mid December. I would like to have everything functional by the end of next week. I still have to pick up the Klipsh floor standers sometime soon, possibly by January. My goal is to use the power supply/car audio with movies and music, on occasion, and to have an SVS PB13 Ultra for television. That way I can keep my kilowatt hours in check so I wouldn't have to be using the PSU 6+ hours a day. I'd just alternate between car and home audio between my RCA jacks and Y adapters.

Anyway, sometime in the next couple days I'll post the components for my 240VAC circuit.:)

I had forgot to post the breaker and the 8/2 this past week; I have to do a lot of reading for my orientation.

Anyway, I couldn't be happier with my TDK GEN 15-220. We did a test run yesterday, and it works wonderfully. Admittedly, there was some kinks in the process. I had attached the ground to the power supply's grounding post, but had forgot to attach the other end to the ground signal post on the HK 3770 leading to ground loop noise at the output. The instructions weren't clear on how to enable Constant Voltage, so I had to play around with the settings on the front panel for about 5 minutes. The cool thing is I can actually lock the front panel preventing accidental erroneous adjustment. So anyway, it occurred to me after I had set the voltage to 14.50V that my only means of taking it out of Constant Current is to adjust the current encoder. I did, and Vwahla, the CV LED illuminated, but I had haphazardly set the current limit to 6A in the process. That means once the demand is greater than 6A, it goes back into Constant Current and my voltage drops. So, I then set the current limit to 100A presuming, of course, JL Audio is right on current demand @14.3V, which is roughly what my VDC drops to through my power and ground lines; I wanted them somewhat on the long side so I could space things out a little. However, I could see myself chopping some of the lines in the future since my amplifier rack will be directly above the power supply's enclosure. That's another thing, we will start to build an enclosure for the supply and an amp rack in the next couple weeks. I'd like for my dad and I to take our flat screen out of the backroom and put it in our main living area. So, he'll be working on a swivel stand for it in the next few weeks also. We have an archaic Sony tube that just came with the RV; it's in an enclosure and weighs a ton. Naturally, all the RCA A/V outputs are in the back ... LOL, PITA...:cryin:

I'll post some images either tonight or tomorrow of the system working. I have a pic of the TDK working with meters illuminated and I do have a pic of the REA XX 12 excursion. It's not major excursion since I still have to line drive the HK 3770's subwoofer pre-amp output voltage. Hey, I guess that's what I got the AudioControl for; somehow I knew I would need that. Perhaps I have ESP?

Can't really guarantee I'll post substantial videos in the next couple years because I'll be studying for my Professional Engineering Exam, Seismic Exam, and Surveying Exam. The norm in my state is to take the PE two years into the profession so I guess I'll have to uphold that. I'll see if I can post the occasional Dropbox vid link and what all I could possibly do with YouTube, but things will most likely be sparse as I can't afford to be preoccupied with it right now.

L8er :cool:.

Here's the images.

3.14*100 - e^(3.14*i) POSTS!!!:cool: