Recently another member and I (this is nothing new - we've just finally got around to doing it) upgraded the power supply on our Crack headphone amps. What a tremendous difference it made! I had no idea...
We added the choke to replace the last resistor, tipped the last cap and replaced the IN4007's with Cree diodes.
Being the clueless follower I am as far as the electronics goes and not having enough cash to buy another Crack and measure things...
What happened? What did those changes do to the supply to make such a change? Neither of us changed the source or connections to the amp. Did it just smooth out the return and supply? Someone send me a stock Crack!!!
My thoughts are that since the source did not change all this wonderfulness has been there all along. We're just cleaning the path to the final destination - our cans.