All the music will stop and as I'm getting out of my car the bass wil sudenly start to slap. I turn the bass knob down and it goes away. It doesn't happen all the time though. Anything I should be worried about or is it just how it powers down or what??
Usually that is the lack of an anti-thump circuit or long enough delay built into the amp,but if you're running the jl in your sig it's something else. Lower quality amps were notorius for turn-on and turn-off thumps