A friend and I were playing around with the stereo and hooked up Pioneer 6980's to a stock Sunfire Cassette Deck. They played pretty loud and had superb low notes, but there was not enough power going to the speakers and the radio display dimmed everytime the bass dropped. Either you can use your stock deck with higher powered speakers and turn the bass down and get only midrange and highs or you can get a 50w x 4 amp like blk03gxs said and get good bass and treble. Personally, I couldn't sacrifice my bass if I had to
