• I think the first knob on the amp controls speaker output, check that's pointing to the right bit?
    It looks like it has lots of in out switches too - could these be cancelling each other out, or the tape monitor switch?

  • I think I've tried every combo of the output selector and the 'tape dub' switches. Very frustrating! I don't have headphones with a large enough jack to try but have tried with a different speaker that I know is working...

    Thanks for the suggestions!

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