(4) Rockville RWB65B 6.5" 250w Marine Wakeboards+MB Quart 4-Ch Amplifier+Amp Kit Rockville RWB65B Pair of 6.5" WakeBoard Tower Speakers Totaling 500 Watts (250 Watts per speaker). Color : Black. 6.5" Two-Way High Fidelity Speaker System. Adjustable Nylon Mounting Bracket Reinforced With Embedded Steel. 1" Polymide Dome Neodymium Midrange Tweeter. Built-In Two-Way Crossover Network. Fully Marinized Against Salt & Fresh Water Conditions. Completely Water / Rust Resistant. Terminals Are Sealed with Rubber Gaskets. Includes Stainless Steel Mounting Hardware MB QUART NA360.4 360 Watt RMS Nautic Series 4-Channel Marine Boat Amplifier . Circuit Topology: Class A/B. Voltage Gain: 0.2V~6.0V. Signal to Noise: &gt;93dB. Frequency Response: 10Hz-45kHz. Crossover Type: Electronic 12dB Per Octave. Crossover Frequency Range CH1 & CH2. .....Hi Pass 250Hz - 4Khz. .....Low Pass 40Hz-250Hz. Crossover Frequency Range CH3 & CH4. .....Hi Pass 250Hz - 4Khz. .....Low Pass 40Hz-250Hz. Four channel Nautic Marine audio amplifier with onboard electronic crossover, bass boost and adjustable input sensitivity. Bridgeable for mono. Rockville RMWK4 4AWG Guage Waterbrroof Marine/Boat Ambrlifier Wire Installation Kit. 25 Translucent, Twisted Pair, High Quality, Tinned-CCA Flexible PVC RCA Cable. 20 4 Gauge High Current, Low Imbredance, Clear Flexible Power Cable with 3 Black Poly Woven Mesh to better resist chemicals in the battery combrartment. 4 4 Gauge High Current, Low Imbredance, Light Blue, Flexible Ground Cable.25 16 Gauge 100% Tinned-OFC, White, Non-Transbrarent Resin PVC, Flat Sbreaker Cable Rockville MRCA20 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. (2) Pairs of Rockville RWB65B 6.5&#034; Black 2 Way Wakeboard Tower Speakers Totaling 1000W (1) MB QUART NA360.4 360 Watt RMS Nautic Series 4-Channel Marine Boat Amplifier (1) Rockville RMWK4 4 AWG Waterproof Marine/Boat Amplifier Installation Wire Kit (1) Rockville MRCA20 20 Foot Twisted Pair Marine RCA Cable <span class="a-text-bold">No exaggerated power ratings :</span> These speakers are rated with true world RMS ratings. No bootleg or exaggerated power ratings like other brands. These speakers are 150 watts RMS and 250 watts peak. (150 watts RMS is equal to about 400 watts rated by other brands) New and improved mounting bracket reinforced with steel - The mounting brackets are waterproof and durable plastic. They are reinforced with nylon and steel to make them extra strong. The nylon allows easy adjusting while the strength of steel can withstand the toughest conditions. Marine grade components and materials: these speakers are truly marine grade. They will not get damaged by water, salt water, or moisture. In addition the terminals (which are normally the first part of a marine speakers that gets damaged by water are made out of stainless steel and they are completely rustproof. There is also an additional waterproof coating cut completely protect the speakers. These can withstand all elements on the water for a lifetime of worry free use The mounting screws are 1/4&#034; longer than other versions we carry to accommodate thicker mounting bars. In addition to wakeboard tower&#039;s on boats, we tested these to be perfect for installing in Jeep Cherokee vehicles and even ATV&#039;s. Rockville RWB65B Pair of 6.5&#034; WakeBoard Tower Speakers Totaling 500 Watts (250 Watts per speaker) <span class="a-text-bold">Color :</span> Black 6.5&#034; Two-Way High Fidelity Speaker System Adjustable Nylon Mounting Bracket Reinforced With Embedded Steel Includes Stainless Steel Mounting Hardware 1&#034; Polymide Dome Neodymium Midrange Tweeter Built-In Two-Way Crossover Network Fully Marinized Against Salt &amp; Fresh Water Conditions Completely Water / Rust Resistant Terminals Are Sealed with Rubber Gaskets Specially Tuned for PA Voice Over Polypropylene Mica Injected Cone with Santoprene Surround High BL Magnet Motor Structure Y30 High Density Magnets Oversized 1.25 Kapton Voice Coil Large mounting screw accommodates roll bars found on many off road vehicles such as Jeep Wranglers, and ATV&#039;s equiped with a roll bar/cage These Wakeboard speakers fit bars ranging from 1.26&#034; to 2.05&#034; and can even fit larger bars with our optional longer screws <span class="a-text-bold">Peak Power Handling : </span>500 Watts (250 Watts per Speaker) <span class="a-text-bold">RMS Power Handling :</span> 300 Watts (150 Watts per Speaker) <span class="a-text-bold">Frequency Response : </span>70  20,000 Hz <span class="a-text-bold">Sound Pressure Level : </span>96dB @ 1w/1m <span class="a-text-bold">Impedance : </span>4 Ohms <span class="a-text-bold">Mounting Depth :</span> 9&#034; (2) Wakeboard Speakers Mounting Brackets Integrated Grill Installation Hardware MB QUART NA360.4 360 Watt RMS Nautic Series 4-Channel Marine Boat Amplifier Circuit Topology: Class A/B Voltage Gain: 0.2V~6.0V Signal to Noise: &gt;93dB Frequency Response: 10Hz-45kHz Crossover Type: Electronic 12dB Per Octave Crossover Frequency Range CH1 &amp; CH2<br> .....Hi Pass 250Hz - 4Khz<br> .....Low Pass 40Hz-250Hz Crossover Frequency Range CH3 &amp; CH4<br> .....Hi Pass 250Hz - 4Khz<br> .....Low Pass 40Hz-250Hz Tone Control: Bass EQ 0~9dB@45Hz Power @ 2-Ohms: 4 x 90 watts Power @ 4-Ohms: 4 x 60 watts Mono Bridged @ 4-Ohms: 2 x 180 watts Total Channels: 4 Audio Inputs: RCA Audio Outputs: Full Range RCA Wire Gauge 12v/GND: 4-GA Wire Gauge Speakers: 12-GA Fusing: 25 Amps x2 Weight: 8 lbs (3.6 kilos) Dimensions: 13.6&#034; x 9.4&#034; x 2.2&#034; (34.5 x 23.8 x 5.5cm) Rockville RMWK4 4AWG Guage Waterproof Marine/Boat Amplifier Wire Installation Kit 25 Translucent, Twisted Pair, High Quality, Tinned-CCA Flexible PVC RCA Cable 20 4 Gauge High Current, Low Impedance, Clear Flexible Power Cable with 3 Black Poly Woven Mesh to better resist chemicals in the battery compartment 4 4 Gauge High Current, Low Impedance, Light Blue, Flexible Ground Cable 25 16 Gauge 100% Tinned-OFC, White, Non-Transparent Resin PVC, Flat Speaker Cable 20 Blue Remote Wire 1PC Silver Mini-ANL Fuse Holder  Clear Shell and Clear Blue Bottom Bracket with Blue Waterproof Ring 1PC 60A Mini-ANL Fuse 2PCS Ring Terminals 2PCS Spade Terminals 5PCS Speaker Cable Terminals 1PC Washer 10PCS White Cable Ties Rockville MRCA20 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