Been working on improving the music sound quality on my Street glide. Just finished installing an alpine amp (forget what model but its 4 channel) and focal 6.5 inch full range speakers. It sounds a world better lots of depth and clarity than the rockford fossgate 5 inch that were in there and blown and a hell of a lot louder, I can actually hear it going down the highway. My deal is now the jvc head unit that the previous owner put in is very low end with only 1.5 volt preamps. I want a media receiver (no cd player) with at least 4v preamp outputs and front and rear and sub. eventually I will add 2 more speakers for the rears right now it only has the 2 front speakers in the batwing faring. any suggestions on what is good now a days? I have been out of the loop in what is good today.