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In Reply to: RE: Latest hifimediy Tripath T4 amp module posted by mwhouston on August 31, 2016 at 05:43:31
but running 16,000 uF on 48V rails (maximum allowed) is only 18 joules of storage for a 360 watt amplifier. You might want to bump that a bit. Or a lot.
By comparison, my ARC SP20 preamp has 23 joules. :)
Follow Ups:
Thanks for the nice comment.
| retro-thermionic |
There is another 10,000uf on the amp module. Infact you can just connect a tranni direct to the board. But the suggestion by the seller is to run them on DC.
The way this one is setup it will provide about 160W. My speakers are Beyma 15" concentrics at 99db efficient. So I only need a few watts for good volume.
| retro-thermionic |
Infact you can...
Sorry, not familiar with the word "infact".
So I only need a few watts for good volume.
Which is the case for most speakers. I find that power supply stiffness really does count at any power level. Even with preamps. :)
:-)
Warmest
Tim Bailey
Skeptical Measurer & Audio Scrounger
Agree, in my 250W Class D I have two 47,000uf Mundorf M-Lytic caps. These caps are massive and ultra low ESR. I went to discharge one with a 100ohm resistor and could draw a blue blame a 1cm long off the cap for about three seconds.
| retro-thermionic |
my 1981 Threshold Stasis 3 amp with 100 watts/channel had. It used 50,000 uF @ 65V rails for 105 joules.
Caps are cheap. Use them liberally for improved resolution and dynamic punch. I learned that lesson long ago from Frank VanAlstine's Dyna modifications.
Back in '76, I boosted an Audire One's power supply from 20,000 uF to 80,000 uF and installed a new bridge. The difference was significant . :)
Not sure if you have read the article which claims your diodes or rec bridge has to deliver 100A short pulses to keep the first cap charged. And that the wiring from bridge to first cap is generally never heavy enough. In this build I soldered the rec bridge direct to the first cap to ensure no loss even through heavy wiring. I also doubled wiring from tranni to bridge.
But I hear and understand what you are saying. And agree.
| retro-thermionic |
is not what I've read - it's what I've heard.
Weak power supplies, regardless of the wiring used don't cut it.
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