Hello I am new to this forum as well as a new 11 civic si owner, I love the car, but i have a question/problem. The factory Subwoofer seems to fade in and out or just is not really working properly I think? I have a Outlander sport with the Rockford Fostgate Factory subwoofer in it and it bumps really good. Any suggestions?

 

It's an air subwoofer and it's only 8" so you can't expect a much really and I have the premium sound package too.

I have an upgraded deck (Kenwood) and you can control the frequence of the sub from it. I lowered my to -70 and it's made a difference. Not like my 10" I had in my previous car but still better then what it was with the stock unit.

 

I know the more crap I put in my trunk, the better it sounds... So I have that going for me, which is nice...