Break down and get an amp. You don't have to break the bank these days. There are a lot of resonable prices and most of these stereo guy's have free install if you don't want the headache. (MTX,Alpine,Poineer). I had the same delima a couple of years ago with my Alpine head unit. I finally decided to get a little 2 channel MTX amp to run my five (yes five) speakers (Boston 6 1/2s front 5 1/2s rear and a bazooka tube. Amazing difference. Since then I've added a second amp (MTX 4 channel) and a sub box with 2 MTX 10s. I hope this helps.