Damn that made a hell of a difference. The gain is now down to a little less than quarter and it's back to being what was normally to loud. Thanks a lot. Sounds clearer at higher volume and saved me from opening up the dash again.
I'm hoping to avoid a new head unit. I'll give the low gain a shot but won't that defeat the purpose of the amp? Wiring one up to turn it basically all the way down seems like a bit of a waste. I'm probably wrong on that though.
I just hooked up an Alpine mini 4 channel amp to my factory radio and now the chime and turn signal are beyond too loud. I've read just about everything that I can find with a google search and no one has a clear solution. What I'm going to try is switching the amp to 2 channel and getting the signal from the rear speakers instead of front and rear. Has anyone tried that?