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In Reply to: RE: power supply vs sound? posted by vinnie2 on February 23, 2015 at 05:35:57
Vinnie
An amplifier is nothing more than a DC power supply that we modulate with an AC signal..Look at an amplifier and tell me the biggest parts you see. A power transformer and a huge set of filter caps especially in a solid state amplifier.
The idea is to get the power supply to produce the purest DC voltage at the lowest impedance that we can along with delivering enough energy to supply the load which in this case would be the tubes or amplifying devices.
So if you ask does the power supply influence the sonic footprint of the amp? Absolutely and this is why Mr McShane always stresses the power supply when you want to rebuild a Citation or a Mac amp to sound better than it ever did from day one,improve the power supply purity and energy delivery from that power supply.
The type of tubes and circuitry also influence the sonic footprint but it's nothing without the power supply.
"If it measures good and sounds bad, it is bad; if it measures bad and sounds good, you have measured the wrong thing."
- Daniel R. von Recklinghausen
Follow Ups:
Thanks Michael, I appreciate your opinion. It's those kind of statements that got me asking the questions I did. I have read similar ones elsewhere.
Edits: 02/24/15
Agreed, the power supply is the amp. It's unfortunate that it's easy to skimp on the power supply and still produce very good specs for advertising. It's a rare commercial amp that really has a good enough power supply that's really large enough to handle transients or that really produces the smooth DC that is desirable. But power supplies are very costly and when you can't show superior numbers for the ad men we get what we've been getting.It's interesting that the latest Soulution amplifier review in TAS cited significant sonic improvements and the main change was a much larger power supply, a ridiculously large one, by the way, compared to almost anything I've heard of.
Edits: 02/23/15
You'll find some of the most desired vintage amps have the best iron and PSU setups.
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