About ten years ago, I had Stan Warren perform two upgrades, one on my former Adcom GFA-555 amplifier and another on my JVC Z1050 CD player. At a cost of only about $300 for each modification, both components came back sounding as if they cost twice as much as I originally paid for the units. I'm not certain if this is still Stan's address and telephone number, but here's what I have on hand.
Supermods (Stan Warren)
2375 W. 21st Ave.
Eugene, Or. 97405
1-503-344-3696
Supermods (Stan Warren)
2375 W. 21st Ave.
Eugene, Or. 97405
1-503-344-3696