Hello all... I'm new to all of this and just picked up a late 80's BC Rich nj warlock and it sounds scratchy and low.. thought it was my amp or bad cable but tried another guitar and they seem ok.. I tried to find more information about the bass but that seems to be a challenge .. I thought it was supposed to have a 9v battery.. but it doesn't... this bass is a 4 string and only has two knobs no on/off switch... any suggestions? Please help