Recently completed a stereo project on my rzr 900xp. I installed all marine grade components a Sony CDX-M20 tuner with an inline noise filter, JL audio 6" speakers in the front lower corners and 2 tweeters in the dash, Boss Audio 6×9 waketower 4 way speakers with a Lanzar AQA 430 WT 1600 watt 4 channel amp with an inline marine quality fuse holder. We welded a 2" cross bar in back of the seats between the 2 rear cage bars to mount the speakers on. This system definitely rocks with plenty of quality sound.