I installed the afore mentioned pre-amp in my $$ yesterday. When I went to test it out, I had almost no volume out if it. I mean, bass turned all of the way up, amp on 10 and it was about as loud as a normal conversation. Battery was new but I changed it anyways and still no better. I turned the trim pot on top of the pre module and although it got a little better the volume was far from being where it should. Has anyone done this mod that may be able to shed a little insight? I'm exhausted from the searches on this one and figured someone might be able to help. Thanks.