Rockville MS40W White 613816407576 sku-846544651 Speakers

Rockville MS40W White marine speaker and amplifier package, listed under Restored Automotive. The package contains 2 pairs of 4" speakers, an MB Quart NA2-320.4 320w RMS 4-channel amplifier for Polaris RZR/ATV/UTV/Cart installations, installation hardware with 8 stainless steel screws and 8 speed clips, a mounting template, an owner's manual and a warranty card.

The speakers are rated at 200W peak per pair, or 100 watts each, and 50 watts RMS per pair, or 25 watts each. Each has a polypropylene cone and dust cap, cloth surround, aluminum voice coil with ASV winding, a 1 inch ASV voice coil and a 1 inch Mylar tweeter with an NdFeB magnet. Impedance is 4 ohms; frequency response is 122Hz to 20 kHz.

Sensitivity is 85dB @1w/1m, and SPL is listed as 85dB 2dB at 1M / 1W. Resonant frequency is listed as 122Hz + or 20% at 1V. The 3.5 Oz Y30 ferrite magnet has F60*F24*8 Y30 details. The IP56-rated construction has an anti-UV molded ABS basket and grille and is described as waterproof and rustproof for salt and fresh water use. Mechanical details include a 3MM plate and 3 MM T-yoke.

Total diameter is 5.12 inches, cutout diameter 3.66 inches, total height 2.36 inches and mounting depth 1.57 inches. Shipping weight is 1.76 Lbs; shipping dimensions are 6 x 6 x 5.7 inches. Speaker parameters are 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 and SD 54 cm2.

The MB Quart NA2-320.4 amplifier provides 320w RMS 4-channel operation with marine-grade protection. Its Q-Stasis pre-amplifier stage reduces incoming source noise. It has 2 pairs of high-temperature, impact-resistant inputs with hex-screw terminals, full-range Class D circuitry and an aluminum heat sink. The combination is intended for marine, outdoor and powersports use. Model: MS40W.

SKU: sku-846544651. UPC: 613816407576.