amplifier longevity

I have a 46 year old GAS Ampzilla and a 41 year old Conrad Johnson MV75A-1 amplifier, and both work and sound great after heavy usage over the years. Both amps have been recapped only once, and the Ampzilla has had all of its driver and power transistors replaced.

Good stuff lasts. The new power transistors in the Ampzilla are 20 amp rented Toshibas vs the original 15 amp Motorola’s. Parts in most, but not all cases can be swapped out. I also have a 30 year old, never been repaired Adcom GFA-535 II in my bedroom stereo that still sounds great.

PASS LABS  !!

@tomic601  @bigkidz @audioman58 

+1

Heat cooks caps. Select specific models. Amps sound different, are built to different standards - choose one within your budget that.also sounds good.

Good luck!

I have and use 3 Adcom amps - GFA 5802, 555, 2535 that still work great. No problems or recaps. Only had one amp ever go bad, a Carver cube amp .

Re: the comment on Counterpoint Mosfets and heat It’s common practice for TO3 devices, mosfet or bipolar, to be covered by plastic covers.  They are there to prevent law suits when people get zapped by the + - rails voltages.  The heat of these devices are dissipated by conduction to the aluminum chassis via the silicone pad.  There’s absolutely no issues with that approach to mounting and using QCovers.