This bundle includes the Kicker 51KPX5001 KPX500.1 500-Watt Powersports & Motorcycle Subwoofer Amplifier and 2x Kicker 51MWF124 - MWF 12-Inch Premium Marine Subwoofer for free-air applications. The Kicker 51KPX5001 KPX500.1 Amplifier is purpose-built for motorcycles, providing 500 watts of power in a compact form. With weather-resistant design, versatile connectivity, and enhanced control options, this amplifier delivers impressive sound quality for your rides. The dimensions are Width: 3-5/8 inch, Height: 1-11/16 inch, Length: 8-1/2 inch. The Kicker 51MWF124 Marine Subwoofers offer big bass without enclosures, featuring weather-proof construction and marine-first innovations like water-proof connections and UV resistance. These subwoofers have a 12-inch polypropylene cone, RGBW LED lighting, and marine-compliant terminals. They can handle 225-450 watts RMS power and have a peak power handling of 900 watts. With a frequency response of 20-500 Hz, sensitivity of 86 dB, and dimensions of Mounting Hole Diameter: 10-3/4 inch, Mounting Depth: 5-3/4 inch, and Outer Diameter: 12-15/16 inch, these subwoofers deliver exceptional marine audio performance. Elevate your motorcycle audio system with this powerful bundle from Kicker, ensuring a premium sound experience wherever you ride.