I think your amp settings are messed up or something. I was able to hear the vocals clearly in my car running stock speakers off a Pioneer HU...and this was with a custom TC 15 on 1.5k
alright what you need to get are about 8 more 6x9 then you get 4 of these audiopipe amps that are cheap and can bang for the 6x9's. Dont even use a box fir the speakers ither just throw them in the trunk and you will love it. The bi tches will be like o fvck that is jhonny with his banging system lets go get a ride.