X3-STAGE3 – Rockford Fosgate 400W Stereo, Front Speaker and Subwoofer Kit for Select Maverick X3 Models. Building on the Stage 2 kit, we add in our full amplifier mounting and installation kit. This literally amps up your sound with the addition of a Power series small chassis amplifier as well as our under seat mounted woofer enclosure that allows for all factory seating adjustments and positions. If you’re ready for big bass while running the trails, then this is for… Continue Reading ››