See post #26

It's nothing radical by any means..5% "maybe" 10% if you want to stretch how great a volume improvement it is.. LOL.

Moving the bass cannon from the line tap to HU output was the biggest bang for the buck... probably added 25% more kick to it.. I have a remote wired volume adjuster on it and before it was mostly dialed all the way up..now it pretty much stays at 75% and still hits fairly hard.