UT65B Black 6.5" 2-Pack + NA2-320.4 Amplifier Bundle
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Rockville
UT65B Black 6.5" 2-Pack + NA2-320.4 Amplifier Bundle
UT65B Black 6.5" 2-Pack + NA2-320.4 Amplifier Bundle
6.5" Rollbar Tower Speakers, 4-Channel Amp, Rocker Bluetooth, IPX6 Enclosures, 360° Mounts
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Regular price
$404.84
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$404.84
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Features
- IPX6 towers with sealed terminals
- 4-channel marine amp for system growth
- Rocker Bluetooth controller with backlight
- 360° swivel brackets fit 1.5"–2" bars
- Balanced, clear outdoor sound
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What's Included in the box
- Pair UT65B 6.5" rollbar tower speakers
- MB Quart NA2-320.4 4-channel amplifier
- Rockville RockerBT Bluetooth controller
- Aluminum brackets and hardware
- Install accessories
SKU: SKU: (2) UT65B+NA2-320.4+RockerBT
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Product Description
Crafted for side‑by‑sides and trail rigs, this kit blends IPX6 tower speakers with a compact 4‑channel marine amplifier and an elegant rocker Bluetooth controller. Enjoy articulate highs and composed mids that stay intelligible over wind and engine noise. With 360° rotating mounts, glove‑friendly control, and corrosion‑resistant hardware, the system delivers reliable audio for dunes, woods, and water—without sacrificing dash space.
This Bundle Includes

UT65B
The UT65B delivers 400W peak and robust sound in a water-resistant, shockproof design. With 360° swivel aluminum brackets, rustproof hardware, and UV protection, these speakers are engineered for marine, UTV, and ATV use—offering premium audio and rugged durability for any outdoor adventure.
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RockerBT v2
RockerBT v2 is a compact Bluetooth rocker switch controller that brings powerful, clear audio to ATVs, boats, and more. With Bluetooth 4.0, aux in/out, and remote amp control, it fits seamlessly into your setup. Backlit buttons and marine-grade protection deliver style, convenience, and durability wherever you go.
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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.
Features
Element-Ready Build
IPX6 housings and marinized internals resist spray, grit, and UV for long-term durability.
Expandable Power
4-channel Class D topology supports future speakers or a sub via bridging for flexible upgrades.
Precision Aiming
360° swivels let you focus coverage toward riders, shore, or campsite in seconds.
Minimalist Control
RockerBT adds Bluetooth 4.0 audio with backlit, tactile buttons in a standard switch slot.
Clean Installation
Compact amp, quick-connect pigtail, and included hardware simplify tidy mounting in tight cabins.

Technical Specifications
- Product Type Rollbar tower speaker, 4-channel amplifier, and Bluetooth bundle
- Speaker Power Handling (Peak/RMS) 400W peak pair / 100W RMS per speaker
- Speaker Impedance 4Ω
- Speaker Frequency Response 60Hz–20kHz
- Amplifier Power (RMS) 80W x 4 @ 2Ω; 40W x 4 @ 4Ω; 200W x 2 bridged @ 4Ω
- Weather Rating IPX6 speakers; water-resistant amp
- Bluetooth Version 4.0 with backlit buttons
- Weight Amp: 2.16 lb
- Dimensions Amp: 3.70" x 5.51" x 1.77"; Speakers: 9.84" x 7.17" x 7.32"