Polaris RZR iPod 2 Speaker add on Unit (use with WP-RZO or WP-ORZ) Double the output of your WP-ORZ RZR/RZR-S overhead audio system. Provides hi-def. stereo sound by adding 2 more 6.5″ marine speakers to your speakers staged directly over head. The amplifier in your main unit is 50×4. This add on utilized the 2nd half of that amplifier. Includes brackets, hardware and instructions. Simply wire in speaker harness to your current unit then connect to the speaker add-on. Works with most roofs.