Jer510
10+ year member
Slap Addict
When making the bass, treble, etc. on the headunit 0 to set the amp gain with a DMM, do I make the sub level (volt level) 0 too? or do I leave that at max. I have an Alpine 9884 headunit and I've heard that anything below the max for the sub level attenuates the signal sent from the headunit to amp. I'm new to all this so thanks..