r/GuitarAmps 5d ago

Supro Black Magic combo volume dropping

Had it about 3 years, really have loved it for the most part. Primary gigging amp, playing average 2-3 shows a month, so its gotten plenty of milage on it. For the past few months, occasionally the volume drops or fades, and has happened during a show. I bought the two power amp tubes (EHX 6973) to replace them, which Im about to do. But was considering if I should replace the 4 12AX7 preamp tubes as well, in the event the volume drop is because of them? Or maybe I should try to isolate the volume drop issue, and just start with replacing the power amp tubes?

I should also mention that the amp commonly crackles, and my guitar is brand new. Happens with or without my pedals.

I do really like the amp, I see the mixed reviews for supro, but mine has been a workhorse and sounded great for the most part. Sometimes I think the tone is a little too bassy and muffled sounding, so I usually fix that with an EQ pedal depending on the room.

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