I’ve decided to “open my books” in a limited way, and start doing a small number of amplifier refurbs. My main business is—and will continue to be—circuit board kits. If my queue gets too long, I’ll stop taking clients, so that wait times are never more than a few months.

I had stopped doing refurbs a couple years ago, because my business was not actually making money, oops! My prices were far too low, and I was trying to crank out two pieces a week, which is just stressful and ultimately impossible. It was actually causing me physical pain trying to keep up that pace.

So now I am looking to do about one or two refurbished amplifiers per month, and I have to charge more than I used to —A LOT MORE— I was seriously under-charging before, especially considering the level of detail and perfection I get into…. all that labor time… :^/ And parts cost is way up.

In this age of high inflation and $4000 silver-faced receivers from the 70s, it’s not unreasonable to ask more. My amplifiers are unique and awesome pieces that will only get cooler in the future. They are made to last, unlike much modern equipment.

I’m only interested in these three models:

GFA-555 I (Including early rack-mount models)

GFA-555 II

GFA-565

If you have an Adcom GFP-555, GFP-555 II, or GFP-565 preamp that goes with your amp, I can refurb that as well, but I’m not interested in refurbishing preamps on their own. I don’t service the GTP series combination tuner-preamps, or any other models not listed, including the GFP-750, sorry.

Prices:

These prices are flat-rate and cover everything except blown output transistors. (Which is rare actually.)

GFA-555 I or GFA-555 II:
See here for work example: https://hoppesbrain.com/2022/09/26/another-tour-of-a-hoppes-brain-adcom-gfa-555-restoration-5-years-later-with-better-technology/

Base-refurb: $930
New Hoppe’s Brain BFA-555 input board. The entire amp is disassembled and cleaned, the output sections refurbished and inspected, etc etc, All the obsessive details I’m known for… Original power supply capacitors are retained. (They are usually just fine.)

Base-refurb + New 20,000uF power supply capacitors: $1130
Kemet ALS70, 20,000uF. This is the maximum capacitance possible without upgrading to the Hoppe’s Brain Smart Soft-Start Power Supply Power-on in-rush current causes the switch to spark too much above this capacitance level.

“The Works”: $1530
Base refurb + New Kemet ALS70, 36,000uF power supply capacitors + Hoppe’s Brain Smart Soft-Start Power Supply:

GFA-565:
See here for work example. https://hoppesbrain.com/ebfa-565-assembly-and-installation-guide/

Base-refurb: $1130
New Hoppe’s Brain EBFA-565 input board. The entire amp is disassembled and cleaned, the output sections refurbished and inspected, new binding posts, etc etc, All the obsessive details I’m known for… Original power supply capacitors are retained. (They are usually just fine, I have never encountered a bad one, but if needed I have spare original capacitors you can have for free.)

“The Works”: $1540
Base-refurb + New Kemet ALS70, 36,000uF power supply capacitors + Hoppe’s Brain BFA-565 Power Supply:

A $300 deposit is required to get started. Contact me through link at the top of the page.

Thanks!
Chris