Does anyone know of a good mod for a Hybrid Marshall AVT 50 to put out a bit more gain? Or should I invest in something like a demonizer?
Either grab a pedal (Why a "Demonizer"? Anything with a ridiculous name like that must sound like crap..) or get a new amp.
dont mess with the amps your break it by a pedal
Replace the preamp tube?
^Don't think that'll make a big difference.