PMX-2, Front Color Optix™ Speaker, Subwoofer & Rear Speaker Kit for Select X3 ModelsPMX 2, 800 Watt, Front Color Optix Speaker, Subwoofer & Rear Speaker Kit for Select X3 Models X317 STG4 Our Gen 3 Stage 4 lets you hit the dunes and trails and make an impact! System allows you to add front and rear Color Optix speakers and a 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