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MB Quart NA2-500.5

500W Peak Class D Nautic Series 5 Channel Marine and Powersports Amplifier

MB Quart
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• + @ 4 ohm
• + @ 2 ohm
• 700 watts x 1 channel @ 1 ohm (subwoofer output)
• Bridged: @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 5-Channel Amplifier

Learn more about the na25005

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This item has been discontinued


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Product Highlights


• + @ 4 ohm
• + @ 2 ohm
• 700 watts x 1 channel @ 1 ohm (subwoofer output)
• Bridged: @ 4 ohm
• Total RMS Power:
• Class D 2 ohm Stable 5-Channel Amplifier

Description


MB Quart brand icon

Authorized dealer

General Features:

  • MB Quart NA2-500.5
  • Class-D Full Range 2-Ohm Stable 5-Channel Amplifier
  • Ultra Compact design built for powersports applications
  • Marine and powersports certified
  • RMS Power Rating:
    • 4 ohm: 40 watts x 4 chan., 100 watts x 1 chan.
    • 2 ohm: 80 watts x 4 chan., 200 watts x 1 chan.
  • Total power output: 500 watts
  • Pulse Width Modulated MOSFET power supply
  • Wired remote bass level control included
  • LED power (green) and protect (red) indicators
  • Soft start turn-on
  • 5/4/2 channel operation
  • Speaker-level (high-level) inputs
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Dual speaker terminals simplify the hookup of multiple speakers
  • Heavy duty aluminum alloy heat-sink
  • Frequency Response: 20 - 20,000 Hz
  • Signal to Noise Ratio: >90dB
  • Variable subsonic filter: 15 - 50 Hz, 12 dB/octave
  • Variable low-pass filter: 50 - 150 Hz, 12 dB/octave
  • Fuse Rating: 40 A x 1
  • 10 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Dimensions: 3.7"W x 8.46"L x 1.77"H
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty
MB Quart NA2-500.5 owner’s manual

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Specifications & Details


Power Specifications - Full Range Channels
Peak Power @ 4 ohms
40 watts x 4 channel
Peak Power @ 2 ohms
80 watts x 4 channel
Power Specifications - Subwoofer Channel
Peak Power @ 4 ohm
200 watts x 1 channel
Peak Power @ 2 ohms
400 watts x 1 channel
Amplifier Specifications
Series
NA2 Series
Amplifier Class
D
Number of Channels
5-Channel
Total Peak Power Output
500 watts
Maximum Input Gauge Size
10 AWG
Minimum Impedance Unbridged
2 ohm
Built-in Crossover
Low-Pass (LP)
Subsonic
Low-Pass Crossover Frequency
50 - 150 Hz
Subsonic Filter
15 - 50 Hz
Signal-to-Noise Ratio
>90 dB
Bass Boost
0 - 12 dB
Remote bass/level controller
Yes
Fuse Rating
40A x 1 
Hi-Res Certified
No
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

NA2-500.5

Weight:

3.35lbs

Internal SKU:

na25005

Internal Product ID:

128349

Product and How-to Videos


Customer Ratings & Reviews


MB Quart NA2-500.5 thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
5
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

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Awesome sound for the price

Bought this to upgrade my Clarion stereo system on my pontoon boat by adding a subwoofer and this is amp. I and totally happy with the results. I had estimates of up to $1,500 to accomplish what I wanted to do and wound up spending approximately $300 on the amp and a Rockford Fosgate subwoofer and it sounds fantastic. Plenty of bass from the Rockford Fosgate subwoofer that I bought with this package and great highs from my 6 kicker speakers. Good support from Sonic Electronix during installation.

By Anonymous on November 28, 2019 Checkmark Icon Verified purchase

31 found this helpful


By Dan on April 5, 2026 Checkmark Icon Verified purchase




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