Looking for some repair/troubleshooting tips. I purchased a vintage Acoustic 220 bass amp a while back (without being able to test it) and finally got a cab to pair it with.
Based on several posts I've seen about this amplifier on different forums, I expected it to be LOUD (comments like "can't go past 9 o'clock without drowning out my band!"). However, even with the volume cranked I can speak over the sound of the amp. The actual tone seems fine and every knob and slider (aside from the bass pot which I assume is just a bad pot I can replace) affects the tone -- it's just the volume is quieter than expected. I've tried another head with the cab I'm using so I can confidently rule out the cab. I've tried both speaker outputs on the head and both have the same output volume.
Based on the symptoms, I'm assuming maybe something with the power amp section is bad? Any idea of what this might be? I'm having trouble finding a readable schematic.
Based on several posts I've seen about this amplifier on different forums, I expected it to be LOUD (comments like "can't go past 9 o'clock without drowning out my band!"). However, even with the volume cranked I can speak over the sound of the amp. The actual tone seems fine and every knob and slider (aside from the bass pot which I assume is just a bad pot I can replace) affects the tone -- it's just the volume is quieter than expected. I've tried another head with the cab I'm using so I can confidently rule out the cab. I've tried both speaker outputs on the head and both have the same output volume.
Based on the symptoms, I'm assuming maybe something with the power amp section is bad? Any idea of what this might be? I'm having trouble finding a readable schematic.