We are powering the stock speakers with the 4 channel 360 watt amp and it does a decent job; the 10's are being powered by the bridged 480 watt amp and it has good base. The weak link is the DVD head unit we choose, it was cheap but does have the option to add a "blind-spot" camera in the future, but the adjustments over sound quality is lacking - that will have to be done more precisely on the amps themselves - but overall, we didn't expect the base to be quite as good as it is, so we are happy; it rattles the hell out of the spoiler to the point that we just put it in the lowered position.