ADCOM BOMS – Parts upgrades, substitutions, and added features for classic Adcom amps and preamps.

Covers 1980’s and 1990’s Adcom GFA-535 MKI & MKII, GFA-545 MKI & MKII, GFA-555 MKI & MKII, GFA-565 and GFA-585.

Coming soon, or maybe someday! GFP-555 I & II, GFP-565, GFP-750, GFA-5300, GFA-5400, GFA-5500, GFA-5800, GFA-5802.

Please send me corrections, comments or additions via the contact form.

These are all to the best of my knowledge and experience. I cannot guarantee there are no errors. Modify your equipment at your own risk. Thanks to the DIY community for helping identify and validate all these upgrades and substitutions over the years.