Rockville MS40W White 4" 200W Marine Speakers (4) + MB Quart NA2-320.4 320w RMS 4-Channel Amp for Polaris RZR/ATV/UTV/Cart

Package contents: (2) Pairs of Rockville MS40W White 4" 200 Watt marine boat speakers (compact), (1) MB Quart NA2-320.4 320w RMS 4-Channel amplifier for Polaris RZR/ATV/UTV/Cart, 2 Speakers, installation hardware (8 Stainless Steel Screws + 8 Stainless Steel Speed Clips), mounting template, owner’s manual, and warranty card. Rockville MS40W speaker highlights: Peak Power: 200 Watts per pair / 100 Watts each. RMS Power: 50 Watts per pair / 25 Watts each. Color: White. Drivers use an Injection Molded Polypropylene Cone with an Injection Molded Polypropylene Dust Cap, cloth surrounds and an Aluminum voice coil with ASV winding (1 inch ASV voice coil). High-frequency reproduction is handled by a 1 inch Tweeter (Mylar Diaphragm with NdFeB magnet). Impedance: 4 Ohm. Frequency Response: 122Hz 20 Khz. Sensitivity: 85dB @1w/1m. SPL: 85dB 2dB (at 1M / 1W). Resonant Frequency (F0): 122Hz + or 20% at 1V. Magnet: 3.5 Oz Y30 Ferrite magnet (magnet details: F60*F24*8 Y30). Construction: IP56 waterproof rating, fully marinized against salt & fresh water conditions, completely waterproof and rustproof at level IP56, anti-UV molded ABS plastic basket & grill. Additional mechanical details: 3MM plate and 3 MM T-yoke. Total Diameter: 5.12. Cutout Diameter in Inches for Mounting: 3.66. Total Height: 2.36. Mounting Depth in inches: 1.57. Shipping weight: 1.76 Lbs. Shipping Dimensions: 6 x 6 x 5.7. Thiele-Small and mechanical parameters: Fs:154.7 Hz. Re:3.2 ohms. Qes:2.57. Qts:1.611. Qms:4.315. Vas:0.847L. Cms:210.222UM/N. Bl:2.468T. MMS:5.029g. XMAX:1.5 mm. SD:54 cm2. MB Quart NA2-320.4 amplifier features: 320w RMS 4-Channel operation with marine grade protection. Pre-Amp Circuitry: the highly engineered Q-Stasis pre-amplifier stage reduces incoming noise from source units, dramatically improving sound quality. Inputs: 2 Pair, high temperature impact resistant with hex screw terminals that allow for secure connections and are erosion resistant. Four channel operation provides complete control of amplifier signal, essential when using two or more amplifiers. Full Range Class D topology delivers high efficiency and significant power from a compact heatsink while maintaining stable power on the PCB with minimal heat generation. Aluminum heat sink quickly dissipates heat to allow the amplifier to run at lower impedance for longer durations. Ideal for marine, outdoor, and powersports use — this combo provides waterproof, UV-resistant speaker performance paired with a compact, efficient 4-channel amplifier optimized for Polaris RZR/ATV/UTV/Cart installations.