Boss ASK904B.64 4-Channel 500W Marine Amplifier W/Bluetooth+(4) Speakers+Amp Kit 4 Channel 500W Marine/Boat Amplifier W/Bluetooth & 4 Speakers. Boss Audio MR6W. Size : 6.5" in. Power Rating : Peak Power Output : 180 Watts per Pair. RMS Power Output : 180 Watts (90 Watts per Pair). Frequency Response 80 to 20000 Hz. SPL (1 Watt / 1 Meter) : 89 dB. Voice Coil Material : Kapton. Cone Material : PolyCarbon. Surround Material : Cloth. Mounting Hole Depth : 2.1". Boss Audio MC900B. Peak Power : 500 Watts Max Power. 4-channel micro weatherproof amplifier. Bluetooth A2DP wireless audio streaming. aptX Support. USB charging bank output. RCA AUX-InputRCA AUX-Input. RCA preamp output to daisy chain multiple amps. Included RED / BLUE-backlit UV / weather resistant silicon button controller. Multi-mount controller system : Includes flush mount bezel and stainless steel handle bar clamp. MUSB35. Universal USB/3.5mm Auxiliary Interface Mount & Cable (3m) Long. Rockville RMWK8 8AWG Guage Waterproof Marine/Boat Amplifier Wire Installation Kit. 25 Translucent, Twisted Pair, High Quality, Tinned-CCA Flexible PVC RCA Cable. 20 8 Gauge High Current, Low Impedance, Clear Flexible Power Cable with 3 Black Poly Woven Mesh to better resist chemicals in the battery compartment. 4 8 Gauge High Current, Low Impedance, Light Blue, Flexible Ground Cable. RCA Interconnect Cable. 20 Ultra-Flexible PVC Shield. Twisted Pair. Premium Audiophile Marine RCA Interconnect Cable. High Performance Water Proof RCA Plugs. Tinned Copper Strands for Sonic Purity. Outstanding Noise Rejection, Accuracy, and Frequency Response