{"product_id":"mb-quart-nautic-4-channel-marine-amp-320w-waterproof","title":"MB Quart Nautic 4 Channel Marine Amp, 320W Waterproof","description":"\u003cp\u003e\u003cstrong\u003eThe MB Quart NA4-320.4 is a 320 watt 4-channel Nautic amplifier for powersports and marine audio, with waterproof potted internals and quick release connectors.\u003c\/strong\u003e It is a compact full range Class D design rated IP67, so it can live in a UTV, boat or RV where water and dust reach the electronics.\u003c\/p\u003e\u003cp\u003eThis marine amplifier is the four channel Nautic. As a 4 channel marine amp, it powers front and rear speakers or a pair of tower speakers plus cabin speakers. As a UTV amplifier it is small enough for tight spaces; MB Quart lists it for marine and powersports use, so it doubles as a boat amplifier or general waterproof amplifier. Among MB Quart amplifier options, this MB Quart amp is the compact 4 channel UTV amp in the Nautic line, a marine amp and powersports amplifier in one.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e320 watt max, 4 channel full range Class D operation\u003c\/li\u003e\n\u003cli\u003e4 x 80 watts at 2 ohms\u003c\/li\u003e\n\u003cli\u003e4 x 40 watts at 4 ohms\u003c\/li\u003e\n\u003cli\u003eIP67 waterproof and dustproof with potted internals\u003c\/li\u003e\n\u003cli\u003eQ-Stasis low noise preamplifier stage\u003c\/li\u003e\n\u003cli\u003eQuick connection power wires and RCA connections; Molex plug speaker connector\u003c\/li\u003e\n\u003cli\u003eProtection circuits for thermal, overload, DC and speaker short with lighted indicators\u003c\/li\u003e\n\u003cli\u003e2 pair nickel-plated RCA inputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBuilt To Solve: Underpowered Speakers in UTVs and Boats\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eSpeakers running off head unit power that distort over engine and wind noise\u003c\/li\u003e\n\u003cli\u003eCar amplifiers that fail when water, dust or vibration reach the circuit board\u003c\/li\u003e\n\u003cli\u003eNo room for a large amplifier under a seat or console\u003c\/li\u003e\n\u003cli\u003eBulky screw terminals that are slow to service\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eBest For: UTV, Boat and RV 4 Channel Amplifier Builds\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eUTV and side-by-side audio builds that need compact waterproof power\u003c\/li\u003e\n\u003cli\u003eBoat and wake setups with marine speakers\u003c\/li\u003e\n\u003cli\u003eRV and outdoor installs where the amp sees moisture\u003c\/li\u003e\n\u003cli\u003eNot a subwoofer amp: MB Quart builds the NA4-400.1 mono for that\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 4 channel\u003c\/li\u003e\n\u003cli\u003ePower: 4 x 80 watts at 2 ohms\u003c\/li\u003e\n\u003cli\u003ePower: 4 x 40 watts at 4 ohms\u003c\/li\u003e\n\u003cli\u003eCrossover: Fixed high pass 80Hz, switchable OFF \/ HP\u003c\/li\u003e\n\u003cli\u003eSignal to noise: \u0026gt; 95dB\u003c\/li\u003e\n\u003cli\u003eFrequency response: 13Hz-29kHz\u003c\/li\u003e\n\u003cli\u003eInput: RCA (2 pair)\u003c\/li\u003e\n\u003cli\u003eInput sensitivity: 0.2-9V\u003c\/li\u003e\n\u003cli\u003eTHD: 1.0%\u003c\/li\u003e\n\u003cli\u003ePower terminal: 12 AWG quick connector; speaker connection: Molex plug connector\u003c\/li\u003e\n\u003cli\u003eFusing: 30A x 1\u003c\/li\u003e\n\u003cli\u003eIP rating: IP67, potted internals\u003c\/li\u003e\n\u003cli\u003eAmp dimensions: 6.8 x 3.94 x 1.77 in; amp weight 2.2 lbs\u003c\/li\u003e\n\u003cli\u003eColor: Black; warranty: 1 year\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: NA4-320.4\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003eMB Quart lists this product as universal: it is not specific to one machine. Fitment is not guaranteed for every mounting location; confirm space, mounting and wiring for your UTV, boat or RV before ordering.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eIs the MB Quart NA4-320.4 waterproof?\u003c\/h3\u003e\n\u003cp\u003eYes. MB Quart states it meets or exceeds IP67 standards for waterproof and dustproof and uses potted internals that seal the components.\u003c\/p\u003e\n\u003ch3\u003eHow much power does the NA4-320.4 make?\u003c\/h3\u003e\n\u003cp\u003eMB Quart rates it at 320 watts max: 4 x 80 watts at 2 ohms; 4 x 40 watts at 4 ohms.\u003c\/p\u003e\n\u003ch3\u003eWill it fit my UTV?\u003c\/h3\u003e\n\u003cp\u003eMB Quart lists the Nautic amplifiers as universal. At 6.8 x 3.94 x 1.77 inches it is compact, but confirm a mounting location and wiring path in your machine before ordering.\u003c\/p\u003e\n\u003ch3\u003eHow do I connect it?\u003c\/h3\u003e\n\u003cp\u003ePower uses 12 AWG quick connectors, inputs are nickel-plated RCA, and speaker outputs use a Molex plug connector. MB Quart publishes a Nautic amplifier quick start guide.\u003c\/p\u003e\n\u003ch3\u003eWhat did it replace?\u003c\/h3\u003e\n\u003cp\u003eMB Quart lists the NA4-320.4 as the replacement for the NA2-320.4.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eWhy MB Quart\u003c\/h2\u003e\n\u003cp\u003eMB Quart's Nautic and Discus lines are built for open-air use on boats, UTVs and RVs, where sun, spray, dust and vibration are part of every trip. MB Quart backs this product with a 1 year warranty.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003ePair the Nautic 4-Channel Amplifier With the Right Speakers\u003c\/h2\u003e\n\u003cp\u003eMatch the NA4-320.4 to speakers and impedance using MB Quart's ratings, and plan a power kit and fuse for your machine or boat. Dunes 2 Dezert SXS carries MB Quart Nautic speakers, Discus amplifiers and powersports wiring kits to complete the system.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the MB Quart NA4-320.4 waterproof?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. MB Quart states it meets or exceeds IP67 standards for waterproof and dustproof and uses potted internals that seal the components.\"}}, {\"@type\": \"Question\", \"name\": \"How much power does the NA4-320.4 make?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"MB Quart rates it at 320 watts max: 4 x 80 watts at 2 ohms; 4 x 40 watts at 4 ohms.\"}}, {\"@type\": \"Question\", \"name\": \"Will it fit my UTV?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"MB Quart lists the Nautic amplifiers as universal. At 6.8 x 3.94 x 1.77 inches it is compact, but confirm a mounting location and wiring path in your machine before ordering.\"}}, {\"@type\": \"Question\", \"name\": \"How do I connect it?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Power uses 12 AWG quick connectors, inputs are nickel-plated RCA, and speaker outputs use a Molex plug connector. MB Quart publishes a Nautic amplifier quick start guide.\"}}, {\"@type\": \"Question\", \"name\": \"What did it replace?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"MB Quart lists the NA4-320.4 as the replacement for the NA2-320.4.\"}}]}\u003c\/script\u003e","brand":"MB Quart","offers":[{"title":"Default Title","offer_id":68072358576164,"sku":"NA4-320.4","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0694\/6488\/3236\/files\/NA4-320.4_01.jpg?v=1794280612","url":"https:\/\/dunes2dezertsxs.com\/products\/mb-quart-nautic-4-channel-marine-amp-320w-waterproof","provider":"Dunes 2 Dezert SXS","version":"1.0","type":"link"}