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MS40B Black 4" Marine Speakers 2-Pack + NA2-320.4 Amp + N2-WBT + MAC40B Bundle
MS40B Black 4" Marine Speakers 2-Pack + NA2-320.4 Amp + N2-WBT + MAC40B Bundle
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Rockville
MS40B Black 4" Marine Speakers 2-Pack + NA2-320.4 Amp + N2-WBT + MAC40B Bundle
MS40B Black 4" Marine Speakers 2-Pack + NA2-320.4 Amp + N2-WBT + MAC40B Bundle
4" IP56 Speakers, 2 Pairs, 4-Channel 320W Amp, Wired Bluetooth, Black Pods
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Regular price
$409.70
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$409.70
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Features
- Two pairs of IP56 4" speakers
- MB Quart 4-channel marine amplifier
- N2-WBT wired Bluetooth controller
- Black aluminum swivel pods
- Clamps, inserts, and hardware included
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What's Included in the box
- 2x pairs Rockville MS40B 4" marine speakers (Black)
- MB Quart NA2-320.4 4-channel amplifier
- MB Quart N2-WBT wired Bluetooth controller
- 2x pairs Rockville MAC40B 4" black swivel pods
- Clamp inserts and mounting hardware
SKU: SKU: (2) MS40B+NA2-320.4+N2-WBT+40KMMTES
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Product Description
Deliver refined tower audio with wired Bluetooth stability and compact Class D power. Two pairs of IP56 speakers mount in sleek black aluminum pods, driven by a 4‑channel amplifier for clean output across passengers. The switch‑mount controller adds discreet, glove‑friendly playback in boats and UTVs.
This Bundle Includes

MS40B
Rockville MS40 4" marine speakers deliver 200W peak power and waterproof durability in a sleek design. With anti-UV ABS construction, rustproof hardware, and a polypropylene cone, these speakers provide clear, powerful sound and lasting performance—ideal for boats, outdoor spaces, or car audio systems.
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NA2-320.4
The MB Quart NA2-320.4 delivers 320W RMS across four channels with clear, stable sound for Polaris RZR, ATV, and UTV applications. Rugged, water-resistant, and compact, it combines advanced pre-amp technology, thermal management, and quick-release connectors for adaptable, high-performance audio in any off-road environment.

N2-WBT
The MB Quart N2-WBT Bluetooth rocker switch controller adds clean, wireless audio control to ATVs, UTVs, and carts. Designed for standard switch mounting, it pairs fast, resists the elements, and delivers intuitive fingertip control with backlit visibility and RCA preamp outputs.

MAC40B
The MAC40 4" aluminum speaker pods combine a sophisticated finish with rugged 6061 aluminum construction. Featuring 360° swivel clamps and waterproof design, they fit bars from 3/4" to 1.5". Enjoy powerful, clear sound and flexible mounting—ideal for ATVs, UTVs, and marine audio enthusiasts seeking premium performance.
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Features
System Synergy
Matched speakers, pods, amp, and controller create a clean, coordinated installation.
Stable Power
Full‑range Class D topology supplies dynamic output with cool operation in tight spaces.
Discreet Control
Switch‑size wired Bluetooth module adds play/pause, track, and volume with a tidy fit.
Weather-Ready Materials
IP56 drivers and powder‑coated 6061 aluminum pods stand up to spray and sun.
Accurate Aiming
360° swivel clamps direct sound to the cockpit or riding position for better coverage.

Technical Specifications
- Product Type 4" marine tower speaker, amplifier, and Bluetooth bundle
- Speaker Power (Peak/Pair) 200 W
- Speaker Power (RMS/Pair) 50 W
- Amplifier Power 80 W x4 @2Ω, 40 W x4 @4Ω
- Bluetooth Range approx. 32 ft
- Waterproof Rating IP56 (speakers)
- Pod Material/Finish 6061 aluminum, black powder coat
- Clamp Fitment 3/4"–1.5" bars, 360° swivel
- Weight Amp 2.16 lb
- Dimensions Amp 3.70 x 5.51 x 1.77 in; Pod diameter 5.3 in