SOX - Super-Symettry SoZ v6

[Super_BQ]

Greetings friends,

It's been a while since i've posted here. I've searched online and it doesn't seem to be anyone that has built this amp. So i've decided to have one here on this side of the country. It's built much like my other Zen amps.

http://www.geocities.com/lelamjade/SOX.html

Note that Geocities may crap out the max. data transfer quota so all you have to do is revisit again later on.

Does Nelson Pass's passdiy.com still accept projects on his gallery? Though i'm not sure if this amp is good enough to be on the gallery. Certainly no SoX i can see on there.

BQ

[LineSource]

Hi BQ,

I enjoyed your website. Thanks for documenting your work. Hope you get the time to write up how your amp sounds with different speakers.

I've built a 16x bipolar output super-sym amp to drive low impedance loads with high dampening, and included a dual bias switch to keep the heat down during normal listing. I wanted one amp that could drive many different loads over the years, and this seemed like the best solution. I put the hi-low bias micro switch on the PCB for good electricals, and poke a plastic rod through a hole in the rear panel to toggle it. I no longer feel responsible for Global Warming...you may want more heat up in Canada!

[MEGA-amp]

Hi Super BQ,


are you using a variac? I seem to remember that at 40V rails, dissipation is around 640 watts/ch at 8 amps. Whats your bias set at? How do those resistors hold up? How does your X-Soz compare to your monster 25 watt SOZ. Im always fascinated when people build these things, now I just gotta build one. Nice Work!!!!

John H.

[Dennis Hui]

Hi BQ,

Good to see a SOX in action.

Welcome back.

Dennis

[Super_BQ]

Mega-amp: Yes the amp is Variac driven! 40V rails was not a problem at all. The problem is that air core inductor can't handle that much current over the hours. My bias is set as noted in the v6 article = 8 amps (4A each)

100 watt Caddocks are holding very fine. I always plan for extra heatsinking so I don't expect any problems with these parts. I don't know if anyone has documented the sound between wirewound power resistors vs. power film types. Perhaps the non-inductive nature of power films would be hands down better.

BQ

[Nelson Pass]

Originally posted by Super_BQ
Does Nelson Pass's passdiy.com still accept projects on his gallery?

You bet. We would love to see an SOX up there.