MB Quart Polaris Off-Road Grade Audio

Nautic Series Amplifiers

Audiophile Marine
Nautic amplifiers are not automotive amplifiers. While they will work just fine in a car or truck, they are purposely built to very strict standards set forth by both the American Boat and Yacht Council (ABYC) marine electronics standards and the American Society for Testing and Materials, ASTM International™. Specific for marine installations the Nautic amplifiers are available in 2, 4, 5 and a 6 channel configurations so you can drive speakers on the deck or in the cabin and have plenty of power for subwoofer channels. It is possible to have “great” sound on the water, the solution is Nautic from MB Quart.

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 Amplifiers
High End Marine
The marine environment is a brutal place for equipment. The MB Quart Nautic series is the perfect choice for your boat, wave runner or river float audio system.

Nautic Amplifiers
On Board Equalization
Nautic Series amplifiers have built in equalization to fine tune the system with variable Frequency adjustment & Level Control & Bass EQ active at 45hz while in LP/BP operation.

Nautic Amplifiers
The highly engineered Q-Stasis pre-amplifier stage is designed to keep incoming noise from source units at nearly immeasurable levels, dramatically improving quality.

Nautic Amplifiers
Class SQ and Class Q1
Multi channel and mono Nautic amplifiers utilize sound quality circuitry Class SQ and Class Q1, the same found in the high end Reference line.

Nautic Amplifiers
MB Quart output devices, FLUID-FETS are painstakingly selected for their ability to efficiently product power and mimic the sound quality of the highest end home amplifiers.

Nautic Amplifiers
Conformal Coating
Nautic are ABYC & ASTM certified to define that marine amplifiers must use conformal coated PC boards to resist corrosion from salt spray & moisture.

NA540.6 Nautic Amplifier

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Part#: NA540.6


6 x 60 @ 4 Ohms, 6 x 100 @ 2 Ohms, 3 x 200 @ 4 Ohms Bridged


Part #: NA540.6 | SKU: 806576221906 | Category: Nautic Series Amplifiers
Six channel Nautic Marine audio amplifier with onboard electronic crossover, bass boost and adjustable input sensitivity. All six channels are full range.


Part #: NA540.6 | SKU: 806576221906 | Category: Nautic Series Amplifiers
  • Power @ 1-Ohm
  • Power @ 2-Ohms
    6 x 90 watts
  • Power @ 4-Ohms
    6 x 60 watts
  • Mono Bridged @ 4-Ohms
    3 x 180 watts
  • Total Channels
  • Audio Inputs
  • Audio Outputs
    Full Range RCA
  • Wire Gauge 12v/GND
  • Wire Gauge Speakers
  • Fusing
    70 Amps
  • Weight
    11.1 lbs (5.03 kilos)
  • Dimensions
    17.01" x 9.4" x 2.2" (43.4 23.8 x 5.58cm)


Part #: NA540.6 | SKU: 806576221906 | Category: Nautic Series Amplifiers
  • Circuit Topology
    Class A/B
  • Voltage Gain
  • Signal to Noise
  • Frequency Response
  • Crossover Type
    Electronic 12dB Per Octave
  • Crossover Frequency Range CH1 & CH2
    Hi Pass 250Hz - 4Khz
    Low Pass 40Hz-250Hz
  • Crossover Frequency Range CH3 & CH4
    Hi Pass 250Hz - 4Khz
    Low Pass 40Hz-250Hz
  • Tone Control
    Bass EQ 0~9dB@45Hz
  • Subsonic Filter


Part #: NA540.6 | SKU: 806576221906 | Category: Nautic Series Amplifiers
More info in development & coming soon!


Part #: NA540.6 | SKU: 806576221906 | Category: Nautic Series Amplifiers
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Maxxsonics Factory Specials
Maxxsonics Factory Specials