Package Includes:

• (2) Pairs of Rockville MS40B Black 4" 200 Watt Marine Boat Speakers Compact and Powerful
• (1) MB Quart NA2-320.4 320w RMS 4-Channel Amplifier Amp for Polaris RZR/ATV/UTV/Cart

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Video of MS40:

 What's In the Box:

• 2 Speakers
• Installation Hardware: (8 Stainless Steel Screws + 8 Stainless Steel Speed Clips)
• Mounting Template
• Owner's Manual
• Warranty Card

Features of MS40B:

• Pair Rockville MS40B 4" 200 Watt Waterproof Marine Boat Speakers
• Peak Power: 200 Watts per pair / 100 Watts each
• RMS Power: 50 Watts per pair / 25 Watts each
• Color: Black
• Injection Molded Polypropylene Cone
• Aluminum voice coil with ASV winding
• Cloth surrounds
• Impedance: 4 Ohm
• Frequency Response: 122Hz – 20 Khz
• Sensitivity: 85dB @1w/1m
• High quality magnet: 3.5 Oz Y30 Ferrite magnet
• 1” inch ASV voice coil
• IP56 waterproof rating
• 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: (Mylar Diaphragm with NdFeB magnet)
• Injection Molded Polypropylene Dust Cap
• SPL: 85dB ± 2dB (at 1M / 1W)
• Resonant Frequency (F0) 122Hz + or – 20% at 1V
• 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”

T/S Parameters:

• Magnet details: F60*F24*8 Y30
• 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

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Description of NA2-320.4:

MB Quart compact Four Channel, 400 watt Powersports amplifier with on-board equalization and simple installation with quick release connectors.

Features:

• 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
• Full Range Class D: High efficient circuit topology which helps the amplifier develop a lot of power in a very small heatsink
• Stable power through the PC board with minimal heat generation
• Aluminum Heat Sink: Quickly dissipates heat to allow the amplifier to run lower impedance for longer duration
• Simpatico Coil Design: The dual coil pulse width modulated power supply keeps voltage constant through the Ultra-Fi output devices
• Output Connections: Quickly remove amplifier when you are putting machine up for the winter as a security precaution
• Gold plated power, ground, speaker and RCA corrosion resistant connections
• Diagnostics: Monitor thermal, overload, DC and speaker short protection with lighted indicators on the amplifier end panel
• Water resistant for durability in any environment

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)