Is the Adcom GFA-5500 bridgeable? How do you do it if it is? Thanks

SOURCE: Adcom GFA 5500 right channel emits horrible sound.

Adcom makes a great amplifer! Usually broken highs and no bass means blown speaker. Try hooking it up to a completely different input source. Try different speakers also. If problem persists, check the fuse. Most will have a fuse on the back you can screw out. Some have two fuses (one for each channel) If this doesn't fix the problem it could be expensive to fix. Also, does this model ave the thermal protection light and if so, does it come on at all?

SOURCE: i looking for fuse for ampli gfa 5500 adcom

go to radio shack near you and change the fuse with the same rate-------or any electronics store near you.

SOURCE: Adcom GFA 5500 'mechanical' hum from amplifier

Possibly. Most amps filter out line hum via low-pass filters. If you can locate a schematic, those would be the caps to check.