I replaced my stereo this spring with a Kenwood deck, Alpine Amp, and 4 Alpine 6.5's (replaced the stock speakers, and added 2 to the inner fairing). The stereo is now LOUD, and CLEAR! It sounds great! BUT... I have virtually no Bass. Would adding 6x9's in the lids give me much? I know I could put subs in the bags, but I don't want to lose the space.