Indigo amplification will perform several modifications to existing Fender designed tube amplifiers. Although we recommend that older and more collectable amps be kept as stock as possible (so as not to diminish their resale value), we can and will on occasion make "non chassis invasive" mods that do not require drilling or significant circuit changes.

AB763 Modifications
"Blackfacing" '65 Reissue amp update
Bring that 1965 re-issue amp more in line with the "real deal". This service includes:

• Output transformer replaced with a proper reproduction
• Main board replacement
• Power supply update

Other Available Modifications:

• 1/2 power switch (on Twin Reverb and Showman models)
• Triode/Pentode switching
• Cathode/Fixed Bias switching
• Adjustable bias board installation
• Reverb for both channels