The 1,500-watt 5-channel amplifier gives you ultimate control of the 6.5" front speakers, 6.5" rear speakers, and 10 subwoofer make this the loudest audio system possible. Allows for future expansion for a secondary 10 subwoofer with rear-seats. A Polaris Ranger Poly Roof equipped with/without the Premium Roof Liner is required for installation of the rear speakers. The system is designed for select 2018 and newer XP 1000 FULL-SIZE (3-seat) and CREW (6-seat) models.