Features :

Pair Rockville MS525B 5.25" 400 Watt Waterproof Marine Boat Speakers 2-Way White
Total Diameter: 5.79"
Cutout Diameter in Inches for Mounting: 5.31"
Total Height: 2.56"
Mounting Depth in inches:1.85''
Shipping weight: 2.42 Lbs
Shipping Dimensions:6" x 6" x 5.7" 
T/S Parameters:
Magnet weight in OZ:6 OZ
Magnet details:Φ70*Φ32*10
Fs:142 Hz
Re:3.2 ohms
Qes:2.08
Qts:1.3
Qms:3.467
Vas:1.712L
Cms:195.49UM/N
Bl:2.967
MMS:6.4g
XMAX:1.5 mm
SD:78.54 cm2
Pair of Rockville MAC525B 5.25" black aluminum can wakeboard tower enclosures
Rugged universal mounting clamps made of 6061 aluminum
Mounting Depth: 5.5" Inches (140mm)
Mounting Hole Diameter: 4.8" Inches (122mm)
Outside Diameter:6.6" Inches (168mm)
Screw Diameter: 5.4" Inches (139mm)
Rockville 1.75" Rubber Adapter Inserts For Polaris RZR Tower Speaker Enclosures
MB Quart NA2-320.4 320w RMS 4-Channel Amplifier 4 Polaris RZR/ATV/UTV/Cart
Specifications:
Certifications: Marine and Powersports
Variable Voltage: 0.2V-0.9V
Signal to Noise Ratio: >90dB
Frequency Response: 20Hz - 20kHz
Bass Boost: 0-12dB at 45Hz
Power at 2-Ohms: 4 x 80W
Power at 4-Ohms: 4 x 40W
Total Channels: 4
Audio Inputs: RCA
Dimensions: 3.70" x 5.51" x 1.77" in (9.4 x 14.0 x 4.5 cm)
Weight 2.16lbs (0.98kg)

• Package Includes : (2) Pairs of Rockville MS525B 5.25" 800 Watt Waterproof Marine Speakers in Black + (2) Pairs of Rockville MAC525B 5.25" Black Aluminum Wakeboard Tower Speaker Pod Enclosures + Pair of Rockville 1.75" Rubber Adapter Inserts For Polaris RZR Tower Speaker Enclosures + MB Quart NA2-320.4 320w RMS 4-Channel Amplifier 4 Polaris RZR/ATV/UTV/Cart
• Pair Rockville MS525B 5.25" 400 Watt Waterproof Marine Boat Speakers 2-Way White . Peak Power: 400 Watts per pair / 200 Watts each. RMS Power: 200 Watts per pair / 100 Watts each. Injection Molded Polypropylene Cone. Aluminum voice coil with ASV winding. Cloth surrounds. Impedance: 4 Ohm. Frequency Response: 110Hz - 20 Khz. Sensitivity:87dB @1w/1m. High quality magnet: 6 Oz Y30 Ferrite magnet. 1" inch ASV voice coil. IP56 waterproof.
• Fully Marinized Against Salt & Fresh Water Conditions. Completely Waterproof and rustproof at level IP56. Anti-UV molded ABS plastic basket & grill. Pre-installed mounting screws included. Perfect for marine, outdoor, and car use. 1" inch Tweeter: (PEI Diaphragm with NdFeB magnet). Injection Molded Polypropylene Dust Cap. SPL: 87dB ± 2dB (at 1M / 1W). Resonant Frequency (F0) 120Hz + or - 20% at 1V. 3MM plate and 3 MM T-yoke.
• Pair of Rockville MAC525B 5.25" black aluminum can wakeboard tower enclosures. Made of high quality 6061 aircraft grade aluminum. Beautiful black powder-coat finish. 100% waterproof and fully marinized against salt and fresh water conditions. Internally wired for clean install-no exposed wires or terminals. High efficiency design features the perfect airspace for 6.5" speakers. Rockville 1.75" Rubber Adapter Inserts For Polaris RZR Tower Speaker Enclosures.  
• MB Quart NA2-320.4 320w RMS 4-Channel Amplifier 4 Polaris RZR/ATV/UTV/Cart. 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 is erosion resistant. Four channel operation. Complete control of amplifier signal, essential when using two or more amplifiers.

Package Includes : (2) Pairs of Rockville MS525B 5.25" 800 Watt Waterproof Marine Speakers in Black + (2) Pairs of Rockville MAC525B 5.25" Black Aluminum Wakeboard Tower Speaker Pod Enclosures + Pair of Rockville 1.75" Rubber Adapter Inserts For Polaris RZR Tower Speaker Enclosures + MB Quart NA2-320.4 320w RMS 4-Channel Amplifier 4 Polaris RZR/ATV/UTV/CartRockville