My new to me Adcom gfa 5500 is having poor bass response. Is anyone experiencing the same. Can anyone help??
Genuinely poor bass response (a fall in output vs frequency) can only realistically be caused by a failing (electrolytic) capacitor in the signal path that has reduced in value and/or developed a high E.S.R.
A scope check will prove if there is a problem.
A scope check will prove if there is a problem.
Replacing C3 just worked perfectly for me yesterday. Getting to it wasn't too bad. I used a closely sized allen wrench in the transistors mounting hole to GENTLY rock and break the transistor from the thermal tape. The only problem I had was one nylon screw holding two transistors to the heat sink lost its head. There was enough of the screws shank to fit a 6-32 nut as if it was threaded rod. I needed to file down the nuts perimeter for the flats to clear the transistors body. I just got a dozen new ones on Ebay. 5500 sounds really good now.