--- product_id: 46904369 title: "MB Quart NA2-500.5 Compact 400 watt Mono Powersports Amplifier to for a subwoofer, Black (NA25005)" brand: "mb quart" price: "Β₯65879" currency: JPY in_stock: true reviews_count: 6 category: "Mb Quart" url: https://www.desertcart.jp/products/46904369-mb-quart-na2-500-5-compact-400-watt-mono-powersports store_origin: JP region: Japan --- # 400W Mono Power Output Compact 9.4x21.5x4.5 cm Size On-board Bass Remote Control MB Quart NA2-500.5 Compact 400 watt Mono Powersports Amplifier to for a subwoofer, Black (NA25005) **Brand:** mb quart **Price:** Β₯65879 **Availability:** βœ… In Stock ## Summary > 🎡 Compact Powerhouse: Big Bass, Small Footprint, Zero Compromise! ## Quick Answers - **What is this?** MB Quart NA2-500.5 Compact 400 watt Mono Powersports Amplifier to for a subwoofer, Black (NA25005) by mb quart - **How much does it cost?** Β₯65879 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/46904369-mb-quart-na2-500-5-compact-400-watt-mono-powersports) ## 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 - β€’ **Precision Bass Control:** Fine-tune your low-end with the included bass remote for the perfect ride soundtrack. - β€’ **Powerful 400W Mono Output:** Unleash deep, thunderous bass with industry-grade power tailored for your subwoofer. - β€’ **Plug-and-Play Installation:** Quick-release connectors make setup effortlessβ€”get booming bass fast. - β€’ **Space-Saving Compact Design:** Fits seamlessly into tight powersports setups without sacrificing performance. - β€’ **Marine & Powersports Certified:** Built tough to withstand the elements and keep your audio pumping on every adventure. ## Overview The MB Quart NA2-500.5 is a compact, 400-watt mono amplifier designed specifically for powersports subwoofers. Featuring a sleek, space-saving form factor, on-board equalization, and an included bass remote, it delivers robust, customizable bass performance. Its quick-release connectors simplify installation, while marine-grade certification ensures durability in rugged environments. ## Description 'MB Quart compact 400 watt mono Powersports amplifier to for a subwoofer with on-board equalization and simple instalation with quick release connectors. Bass remote included Category: NA2 Amplifiers SKU: 806576227366 Part #: NA2-500.5 Specifications CLASS Full Range Class D VARIABLE VOLTAGE 0.2V~9V SIGNAL TO NOISE RATIO>90dB FREQUENCY RESPONSE 20Hz-20kHz CROSSOVER TYPE N/A CROSSOVER FREQUENCY RANGE CH1 & CH2 Switched HP/ Full CROSSOVER FREQUENCY RANGE CH3 & CH4 Switched HP/ Full CROSSOVER FREQUENCY RANGE CH5 LPF 50Hz-150Hz BASS BOOST 0-12dB@45Hz SUBSONIC FILTER 60Hz POWER @ 2-OHMS 4 x 80W + 1 x 200W POWER @ 4-OHMS 4 x 40W + 1 x 100W TOTAL CHANNELS 5 AUDIO INPUTS RCA POWER TERMINAL 12V/GND Molex 10 ga SPEAKER TERMINAL WIRE GAUGE Molex Plug Connector FUSING 1 x 40 Amps CERTIFICATIONS Marine & Powersports DIMENSIONS 3.70 X 8.46 X 1.77 in 9.4 X 21.5 X 4.5 cm WEIGHT 3.35 lbs (1.52 kg)' Review: Works great for replacing Kawasaki krx hiphonics amp - Works great Review: Crappy quality amp, even worse seller. - Got the amp all wired in (all connections properly soldered and heatshrinked), front channels wouldn't work. Turns out the crossover switch for the front channels is very finnicky and if touched it causes the front channels to cut in and out. I contacted the seller - Audio Watt Store - wanting to see if I can get a replacement first so I don't have to undo the soldered connections and chop up wires to return this. They said I can do so via desertcart returns. I initiate an desertcart return, item never comes, check a week later, order (for the return) cancelled. I initiate another return, replacement item still waiting to be shipped. If I have to undo all of the soldered connections to get a working amplifier, it won't be an MB Quart, and it definitely won't be from this seller. And it's starting to look like this will be the case. This is the price of having everything built in china, dealing with chinese sellers who don't understand plain English and cannot perform simple duties. Edit: I did have to cut the wires out and return this as I was not able to receive a working unit first after almost a month of going back and forth. Spend your money elsewhere, on something higher quality. ## Features - 400 Watt Mono Powersports Amplifier - For A Subwoofer - Compact - Package Dimensions: 7.9 L x 35.8 H x 17.5 W (centimeters) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B06X16JSR1 | | Best Sellers Rank | #88,725 in Electronics ( See Top 100 in Electronics ) #158 in Car Mono Amplifiers | | Brand | MB Quart | | Built-In Media | Remote | | Customer Reviews | 4.2 out of 5 stars 27 Reviews | | Item Type Name | MB Quart NA2-500.5 Compact 400 watt | | Item Weight | 16 ounces | | Manufacturer | Mbquart | | Mfr Part Number | NA25005 | | Model Number | NA25005 | | Number of Items | 10 | | Unit Count | 1 Count | | Warranty Description | Manufacturer | ## Product Details - **Brand:** MB Quart - **Speaker Maximum Output Power:** 400 Watts - **Frequency Response:** 20 KHz - **Connectivity Technology:** Wired - **Audio Output Mode:** Mono ## Images ![MB Quart NA2-500.5 Compact 400 watt Mono Powersports Amplifier to for a subwoofer, Black (NA25005) - Image 1](https://m.media-amazon.com/images/I/81XNuUSyPCL.jpg) ## Questions & Answers **Q: This says its an NA2-500.5, which is a 5 channel amplifier, yet this also says mono sub amp, which is it?** A: The sub output of this 5 channel amp is mono. **Q: Whre are th rca inputs located ? I cant dee them in the amp itself** A: There is a pigtail that plugs into the Amp that has the inputs for the 5 channels the RCA connectors **Q: Can i bridge the front 4 channels to eyn two tower speakers?** A: Yes you can ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great for replacing Kawasaki krx hiphonics amp *by E***C on April 25, 2026* Works great ### ⭐ Crappy quality amp, even worse seller. *by A***T on April 19, 2022* Got the amp all wired in (all connections properly soldered and heatshrinked), front channels wouldn't work. Turns out the crossover switch for the front channels is very finnicky and if touched it causes the front channels to cut in and out. I contacted the seller - Audio Watt Store - wanting to see if I can get a replacement first so I don't have to undo the soldered connections and chop up wires to return this. They said I can do so via amazon returns. I initiate an amazon return, item never comes, check a week later, order (for the return) cancelled. I initiate another return, replacement item still waiting to be shipped. If I have to undo all of the soldered connections to get a working amplifier, it won't be an MB Quart, and it definitely won't be from this seller. And it's starting to look like this will be the case. This is the price of having everything built in china, dealing with chinese sellers who don't understand plain English and cannot perform simple duties. Edit: I did have to cut the wires out and return this as I was not able to receive a working unit first after almost a month of going back and forth. Spend your money elsewhere, on something higher quality. ### ⭐⭐⭐⭐ Not bad *by D***. on July 20, 2020* I'd give it 5 stars if it had adjustable crossovers... but so far I've been almost completely happy, and considered getting another one for my jeep. ## Frequently Bought Together - MB Quart NA2-500.5 Compact 400 watt Mono Powersports Amplifier to for a subwoofer, Black (NA25005) - MB Quart GMR7V1 7" Waterproof CarPlay Marine & UTV Stereo - Bluetooth 5.0, Dual Zone Audio, IPX67 Rated for Boats, Polaris RZR, Can-Am X3 - MB Quart NA2-320.4 Compact Four Channel, 320 watt Powersports Amplifier, Black --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/46904369-mb-quart-na2-500-5-compact-400-watt-mono-powersports](https://www.desertcart.jp/products/46904369-mb-quart-na2-500-5-compact-400-watt-mono-powersports) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-08-24*