Search  for anything...

MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black

Based on 180 reviews
Condition: New
Checking for the best price...
$149.99
Holiday Deal · 25% off was $199.99

Buy Now, Pay Later


As low as $25.00 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Free shipping on this product

FREE 30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: Only 3 left in stock, order soon!
Fulfilled by Creative Audio

Arrives Tuesday, Nov 17
Order within 13 hours and 52 minutes

Available payment plans shown during checkout

Protect Your Purchase

Easy claims online, fast replacements, no fees

Checking for protection plans...

At a glance

Condition
New
Model
NA24002
Weight
2.1 lb
Material
Aluminum
Voltage
9 volts
Mounting Type
Surface Mount
Output Power
400 watts
In the box
NA2-400.2-KL

Features 5

  • 2-channel waterproof boat sound amplifier with marine-specific connectors built to withstand extreme weather and salt spray; 2-channel operation with a flexible installation that allows for 2-channel or bridged mono mode
  • Features 400-watt maximum power output and RMS power of 2 x 200 watts at 2 ohms and 2 x 100 watts at 4 ohms; Variable low pass crossover at 12dB per octave: 300Hz
  • Low-noise preamplifier circuit maximizes power at low voltage without creating distortion, producing only quality music audio; Switched full, LPF, and HPF crossover with complete control over amplifier signal
  • Aluminum heatsink dissipates heat quickly to allow the amp to run on lower impedance for longer duration; Simpatico coil design with PWM power supply keeps voltage constant through Ultra-Fi output devices

Description

'MB Quart compact Two Channel, 400 watt Powersports amplifier with on-board equalization and simple instalation with quick release connectors. Specifications CLASS Full Range Class D VARIABLE VOLTAGE 0.2V~9V SIGNAL TO NOISE RATIO>90dB FREQUENCY RESPONSE 20Hz-20kHz CROSSOVER TYPE Electronic 12dB Per Octave LOW PASS CROSSOVER SWITCH LOW PASS 300 HZ BASS BOOST 0-12dB@45Hz SUBSONIC FILTER 60Hz POWER @ 2-OHMS 2 x 250W POWER @ 4-OHMS 2 x 125W TOTAL CHANNELS 2 AUDIO INPUTS RCA POWER TERMINAL 12V/GND Molex 10 ga SPEAKER TERMINAL WIRE GAUGE Molex Plug Connector FUSING 1 x 30 Amps CERTIFICATIONS Marine & Powersports DIMENSIONS 3.70 X 5.51 X 1.77 in 9.4 X 14.0 X 4.5 cm WEIGHT 2.12 lbs (0.96 kg)'

Specs 19

Voltage 9 volts
Manufacturer MB QUART
Mounting Type Surface Mount
Brand MB Quart
Number of Channels 2
Output Power 400 watts
Package Type Name Box
Maximum Output Power 400 watts

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Nov 17

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


powerful yet very clean output great for high quality 6.5" or 6x9 speakers
Pack a clean punch to my premium Kicker marine 6.5" in my golf cart
Reviewed in the United States on December 19, 2025 by jt

Great sound quality.
This little thing packs a punch. I have it on my RZR and it’s small enough to hide under the hood area and has more than enough power for my needs. I run this one with 4 Polk speakers and it sounds really nice. Would recommend!
Reviewed in the United States on March 8, 2025 by Lonnie Halbert

Great amp!
I drop a a video just to show you guys the sound quality of the amp. It is connected with bluetooth and it still sounds awesome. I love this amp. Throws out an amazing amount of power easy to put anywhere. For any application. I used this on my Yamaha wave runner. I did the install myself and like I said before you can put it anywhere. This is a must buy. Especially for the price. Great job MB Quart! ... show more
Reviewed in the United States on July 28, 2020 by Flores

Gets It Done
I bought two of these amps for my 2011 Dodge Ram for under the rear back seat; one for the 6x9s in back and one for the 10 inch subwoofers in back. Not an overly loud amplifier, but enough to provide good sound for inside the cab... plus the Low Profile design fits nicely underneath the rear seat with plenty of room left over for other item. Sounds great and no issues so far. ... show more
Reviewed in the United States on September 6, 2024 by Greg L

Small but does the job!
2 channel power for boat speakers - perfect for small boats where you don't plan to have more than 2 speakers. This is powering a pair of mid-level JLs on a 20' boat and it's making them sound more than adequate.
Reviewed in the United States on June 30, 2025 by Joseph M Marois

Great little amp for the price
Great little amp for the price. Easy to hook up. Compact. Powerful. Using it to drive the subs under my driver and passenger seats in my stinger.
Reviewed in the United States on November 7, 2025 by CTiger

Good value
Great value for a great price
Reviewed in the United States on February 10, 2026 by bjs

Awesome amp
For the price I was surprised. It powers 2 100w RMS DS18 speakers in my canam x3. It gets very loud and sounds great. Can't beat it for a clean simple install , especially at this price .
Reviewed in the United States on February 11, 2024 by Erick
Checking for best price...