NA1 Amplifiers

Big on Sound. Small on Size.
The new NA1 compact amplifiers feature a proprietary full range class D design that provides a very small footprint making these amps perfect for installation in applications where size matters. Each NA1 compact amplifier features a detachable wire harness that simplifies installation in tight spaces. Simply wire it up then plug it in! Although these amps are small in size, they’re big on power and features. There’s no shortage of controls necessary to dial your system in and there’s plenty of power on hand to satisfy the demands of nearly any speaker.

Life Shield
When you see this Life Shield badge on an MB Quart product, you can rest assured you are choosing a product that has been designed and tested against the elements. Whether it’s waterproof, dust proof, snow proof or shock proof, you will know that this product has been built to handle the outdoors.

Nautic Subwoofers
Compact Powersports
The NA1 line of compact powersports amplifiers are designed to help put great systems into UTV and smaller marine craft. The NA-1 line includes a two channel, a four channel and a mono for powering subwoofers.

Nautic Subwoofers
System Controls
Various equalization controls of the three models plus variable inputs from 0.2V-4V on low level and 0.8V - 15V on high level allow easy customizing of system design.

Nautic Subwoofers
Sealed End
Sealed and removable system connections minimize exposure to the elements and help keep the overall size of the NA1 chassis very small and simplify installation.

Nautic Subwoofers
Class D Power
Full range Class D high power technology delivers efficiency in power with increased engineering that delivers big sound while remaining very musical in a compact chassis.

Nautic Subwoofers
Massive Heatsink
Even with big power, the heavy duty extruded aluminum heatsink will keep the amplifier cool and prevent heat robbing distortions from ruining the music.

Nautic Subwoofers
Conformal Coating
All MB Quart Nautic amplifiers are ABYC & ASTM certified which defines that marine amplifiers must use conformal coated PC boards to resist corrosion from salt spray & moisture.

NA1-320.4 Nautic Amplifier

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NA1-320.4 Nautic Amplifier

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Part#: NA1-320.4


4x80 watt compact powersports amplifier


The NA series of powersports amplifiers are designed for off-road vehicles with proprietary full range class D technicalogy which allows for great sound quality and unusually loud volume to fit into very limited space. This compact four channel power sports amplifier delivers great sound to four speakers with just the right features to dramatically improve the sound on any road.

Category: NA1 Amplifiers
SKU: 806576223320
Part #: NA1-320.4

  • Power @ 1-Ohm
  • Power @ 2-Ohms
  • Power @ 4-Ohms
    4 x 80 watts
  • Mono Bridged @ 4-Ohms
  • Total Channels
  • Audio Inputs
    RCA High Level
  • Audio Outputs
  • Wire Gauge 12v/GND
    Molex Plug Connector
  • Wire Gauge Speakers
    Molex Plug Connector
  • Fusing
    20 Amps
  • Weight
    2.2 lbs (0.9 kilos)
  • Dimensions
    5.5" x 3.7" x 1.7" (14 x 9.4 x 4.4cm)

Features & Benefits
  • Circuit Topology
    Full Range Class D
  • Voltage Gain
    0.2V~4V Low Level
    0.8V~15V High Level
  • Signal to Noise
  • Frequency Response
  • Crossover Type
  • Crossover Frequency Range CH1 & CH2
  • Crossover Frequency Range CH3 & CH4
  • Tone Control
  • Subsonic Filter

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