[quote name='Conan' timestamp='1427956611' post='2736181']
Just to further complicate things... I used the TH500 again at last night's rehearsal and it was sounding brilliant!! Full, warm and rich and just sitting perfectly in our band mix! Still that "edge" to the sound (that I tend to think of as "distortion") but maybe that's just part of the character.
Tone controls all set flat (except for the treble which was at around 2 o'clock) and drive fully off. Boosting mids or bass at all causes the clip light to come on...
Maybe I just needed more time to get used to this amp, I dunno. Anyway, it's off for its service this weekend so maybe we'll get to the bottom of whether it has a fault or not!
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I can push mine a good bit before any clipping starts, even with an active bass. Even at silly volumes at 4 ohms and a 212.
Once it's been looked at you'll know where you stand with it. These are pretty versatile amps imo.