Rockford Fosgate PMX-2, Front Color Optix™ Speaker and Subwoofer KitPMX 2, 800 Watt, Front Color Optix Speaker and Subwoofer Kit for Select X3 Models X317 STG3 Our Gen 3 Stage 3 gets you ready for bass in your face while running the trails. System allows you to add front Color Optix speakers and subwoofer on select Maverick X3 models. Kit is equipped with a PMX 2 digital media receiver, upper dash kit, front speaker panels, M1 6. 5 Color Optix speakers, 800 watt Element Ready amplifier, under seat front subwoofer