--- product_id: 45932263 title: "MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black" brand: "mb quart" price: "$28.20" currency: USD in_stock: false reviews_count: 9 url: https://www.desertcart.us/products/45932263-mb-quart-marine-powersports-nautic-2-channel-400-watt-maximum store_origin: US region: United States of America --- # 400W max power output IPX5 waterproof rating Quick disconnect RCA & power connectors MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black **Brand:** mb quart **Price:** $28.20 **Availability:** ❌ Out of Stock ## Summary > ⚡ Unleash Marine-Grade Power & Precision Sound Anywhere You Go! ## Quick Answers - **What is this?** MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black by mb quart - **How much does it cost?** $28.20 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/45932263-mb-quart-marine-powersports-nautic-2-channel-400-watt-maximum) ## Best For - mb quart enthusiasts ## Why This Product - Trusted mb quart brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Power that Roars:** Delivers up to 400 watts max power with 2 x 200W RMS at 2 ohms for crystal-clear, high-impact sound on the water or off-road. - • **Cool Under Pressure:** Aluminum heatsink and PWM MOSFET power supply keep the amp running cooler and longer, even under heavy load. - • **Plug & Play Freedom:** Quick disconnect RCA and power terminals make seasonal installation and removal effortless—no hassle, no downtime. - • **Built for the Elements:** IPX5-rated waterproof design with marine-grade connectors ensures relentless performance against salt spray and harsh weather. - • **Precision Audio Control:** Variable low pass crossover and bass boost let you tailor your sound with professional-grade clarity and zero distortion. ## Overview The MB Quart Nautic 2 Channel 400W Class D amplifier is a compact, marine-certified powerhouse designed for extreme weather and salt spray resistance. Featuring 2-channel or bridged mono operation, it delivers up to 400 watts max power with low-noise circuitry and advanced crossover controls. Its quick disconnect connectors and aluminum heatsink ensure easy installation and reliable, cool performance—perfect for boaters and powersports enthusiasts who demand premium sound on the move. ## 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)' Review: 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 Review: 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! ## Features - 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 - Quick disconnect wires and RCA connections for quick removal during the off-season; RCA-nickel plated are high temperature and impact protected to provide secure connections ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06X16DLGT | | Best Sellers Rank | #66,681 in Electronics ( See Top 100 in Electronics ) #40 in Marine Amplifiers | | Brand | MB Quart | | Brand Name | MB Quart | | Customer Reviews | 4.6 out of 5 stars 181 Reviews | | Included Components | NA2-400.2-FBA | | Item Type Name | A-B Box | | Item Weight | 2.12 Pounds | | Manufacturer | MB QUART | | Material Type | Aluminum | | Maximum Output Power | 400 watts | | Model | NA24002 | | Mounting Type | Surface Mount | | Number of Channels | 2 | | Output Power | 400 Watts | | Package Type Name | Box | | Part Number | NA24002 | | Specification Met | Astm, Ipx5 | | UPC | 806576227342 | | Unit Count | 1.0 Count | | Voltage | 9 Volts | | Warranty Description | N/a. | ## Product Details - **Brand:** MB Quart - **Manufacturer:** MB QUART - **Mounting Type:** Surface Mount - **Number of Channels:** 2 - **Voltage:** 9 Volts ## Images ![MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black - Image 1](https://m.media-amazon.com/images/I/61i9kjrV1dL.jpg) ![MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black - Image 2](https://m.media-amazon.com/images/I/61QhN4ndk2L.jpg) ![MB Quart Marine Powersports Nautic 2 Channel 400 Watt Maximum Power Full Range Class D Amplifier with PWM MOSFET Power, Black - Image 3](https://m.media-amazon.com/images/I/61+a8BqOjtL.jpg) ## Questions & Answers **Q: Will this plug and play into ride command and rzr door speakers?** A: Yes it plugs into the ride command behind the head unit. Not sure on the speakers since I run pods only but if the speakers you have are connected to the ride command it should be fine **Q: Will this work to power one 10in sub?** A: It pushes my two 8” mid range speakers well. Unfortunately I don’t think this amp is bridgable so it’s probably not the right choice for a single sub. **Q: Is the 900w amp stereo or mono sub amp?** A: It isn't 900 watts. It is 200x2 watts RMS at 2 ohms, so that is 400 watts total. It is fused with a single 30amp fuse. **Q: Will this power a pair of 6.5 kicker ds door speakers and this plugs in your stereo** A: Plugged right into my razor with ride command. It powers a pair of roll bar mounted speakers on mine just fine. ## Customer Reviews ### ⭐⭐⭐⭐⭐ powerful yet very clean output great for high quality 6.5" or 6x9 speakers *by J***T on December 19, 2025* Pack a clean punch to my premium Kicker marine 6.5" in my golf cart ### ⭐⭐⭐⭐⭐ Great sound quality. *by L***T on March 8, 2025* 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! ### ⭐⭐⭐⭐⭐ Great amp! *by F***S on July 28, 2020* 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! ## Frequently Bought Together - MB Quart, 2 A-B Box, Black (NA24002) - MB Quart NA2-400.1 Compact 400 watt Mono Powersports Amplifier to for a subwoofer - MB Quart NA2-320.4 Compact Four Channel, 320 watt Powersports Amplifier, Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/45932263-mb-quart-marine-powersports-nautic-2-channel-400-watt-maximum](https://www.desertcart.us/products/45932263-mb-quart-marine-powersports-nautic-2-channel-400-watt-maximum) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-17*