I have 3 JP 90's and have already modified one with different pickups . But I'm looking to really mod one of the others, has anyone used a preamp and if so what did you use ?
I clicked on the link provided and there were 10 items marked as overstock and they were all guitar amps , or at least that's what popped up from the link . I am a fan of Mark bass amps and would like to get another.