Originally Posted by Ypoknons
Power supplies can definitely make a difference, it's not really controversial
. As for amplification, really we've quite a few threads* on that recently, and my reasonably well informed opinion is if you can't tell the difference with a quality amp, then you need to work on your hearing.* See the HD800 out of Xonar STX, High End Headphone Myth and Stereo Receiver threads, amongst many others
Apologies, but I am little confused. I am not very technical when it comes to the finer details of electronics, but what I gathered from the article in the link you posted contradicts what you said 'Power supplies can definitely make a difference'.
From the article - "...speed is valid for a regulated supply for a critical application, but is completely meaningless for a power amplifier with an unregulated supply - which is 99.9% of them."
"I can make a power supply "slow", simply by placing some resistance in series - the caps will no longer be able to discharge at their maximum rate. Will this affect an amplifier? Only in that the maximum power will no longer be achieved, but this will also happen if the AC mains supply is 10% low. Does this somehow degrade the sound of an amplifier? I think not."
For a layman such as myself, I am getting a little lost...
I guess all I can do is an A/B test for myself (which in themselves are flawed as you know which component you are listening to before the test starts).
Some hard, scientific evidence for one way or the other would be great!