Sadowsky Metro Express P/J Jazz

[Stealth]

Bit of a saga with this one. So I had an issue I assume with the preamp as it worked fine in passive. No output with the bass and treble off and tinny noise with maxed Fair play to Thomann who shipped the bass back at their cost and returned it “fixed” So now it sounds and plays great. But…..if I max the bass in active mode there’s Distortion even if I back the gain right of on whatever I plug into. Not a massive problem as there is tons of bass before it happens. Are they all like this ?

any ideas