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December 02, 2022, 09:11:47 PM

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Distorted sound only on "High" input

Started by solidstatularbells, Today at 11:27:04 AM

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I bought a used Gear4Music house brand 35W solid state amp. 2 inputs (High & Low), TMB EQ stack, Master Volume. The PCB has "BELCAT CORP. SED-03" printed on it.

I have no schematic for the circuit.

On the Low input, it works fine, but on the high input it distorts when I play hard. Particularly low notes.

What could be the fault? I am not an electronics expert, but I can certainly manage to replace a capacitor or resistor. I assume the High input only has a few extra components so that it will be easy to replace just those.

Of course, if anyone has the schematic on hand, that would be useful.


From your description, I would say the amp is acting normally. What would you have it do differently ?