Basically, the treble knob broke off... there's nothing to grab on to. I'm wanting to trade it towards an ashdown 220 combo, so I'm hoping to replace it, get it back to new. The problem is its more like a chip or something, rather than a tone pot type thing. It's like.... digital? Maybe? I really don't know what it is, therefore i don't know how to find a replacement... or figure out how to replace it. I'm not sure how to disconnect it from the circuit board. Anyway, all it says on it is 22z 104w. Can anyone help me out with finding another, or info on how to replace it? Thanks in advance, i really appreciate any help.