{"product_id":"mb-quart-discus-2-channel-marine-amplifier-with-top-mounted-controls-500-watts","title":"MB Quart Discus 2 Channel Marine Amplifier with Top Mounted Controls, 500 Watts - 431770","description":"\u003cp\u003eTake your marine audio system to the next level with the MB Quart Discus 2 Channel Marine Amplifier, engineered for powerful performance and rugged durability in harsh environments. Delivering up to 500 watts of clean, efficient power at 2 ohms of amp power and 300 watts at 4 ohms of amp power, this amplifier is built to handle life on the water while providing exceptional sound clarity and control. Its potted internal components add an extra layer of protection against moisture, vibration, and corrosion, making it ideal for boats, UTVs, and other outdoor applications.\u003c\/p\u003e\n\u003cp\u003eAt the heart of the system is a highly efficient Class D topology, allowing the amplifier to generate significant power while maintaining a compact design and minimizing strain on your electrical system. The premium MOSFET Pulse Width Modulation power supply ensures consistent output, while MB Quart’s FLUID-FET output devices deliver clean, high-quality sound that rivals high-end home audio systems.\u003c\/p\u003e\n\u003ch2\u003eMB Quart Discus 2 Channel Marine Amplifier with Top Mounted Controls, 500 Watts - 431770\u003c\/h2\u003e\n\u003cp\u003eThe Q-Stasis preamplifier stage maximizes low-voltage input signals with minimal distortion, preserving audio detail and clarity. Variable electronic crossovers and onboard sound contouring features, including bass boost and adjustable input sensitivity, allow you to fine-tune your system for optimal performance.\u003c\/p\u003e\n\u003cp\u003eBuilt for convenience and reliability, the amplifier features waterproof connectors and prewired RCA inputs for secure, corrosion-resistant connections. Top-mounted controls are sealed for protection yet easily accessible for quick adjustments. LED system diagnostics provide real-time feedback for overload and short protection, ensuring your system stays safe and performing at its best.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eMB Quart Discus 2 channel amp delivers 2x250W @ 2 ohm, 2x150W @ 4 ohm, or 500W bridged @ 4 ohm—ideal marine amp, motorcycle amp, and UTV audio system upgrade\u003c\/li\u003e\n\u003cli\u003eFully sealed, waterproof, and dustproof design built for boats, ATVs, UTVs, motorcycles, and outdoor audio systems in harsh environments\u003c\/li\u003e\n\u003cli\u003eSmall footprint amplifier is perfect for tight installs where space is limited\u003c\/li\u003e\n\u003cli\u003eAdvanced Class D technology produces powerful, clean sound while reducing heat and electrical load for tight installs and powersports applications\u003c\/li\u003e\n\u003cli\u003eVariable high\/low pass crossover (15Hz–300Hz), adjustable input sensitivity (0.2V–9V), waterproof connections, and LED protection indicators for reliable performance\u003c\/li\u003e\n\u003cli\u003eColor: Black\u003c\/li\u003e\n\u003cli\u003eDimensions (L x W x H): 22.0 x 6.0 x 4.0 inches\u003c\/li\u003e\n\u003cli\u003eWeight: 5.85 pounds\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli data-section-id=\"1dhm1p4\" data-start=\"28\" data-end=\"230\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"62\"\u003ePowerful marine performance:\u003c\/strong\u003e The MB Quart Discus 2 Channel Marine Amplifier 431770 delivers up to \u003cstrong data-start=\"132\" data-end=\"154\" data-is-only-node=\"\"\u003e500 watts of power\u003c\/strong\u003e, providing clear, dynamic sound for boats, ATVs, and outdoor audio systems.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1w7g50\" data-start=\"231\" data-end=\"409\"\u003e\n\u003cstrong data-start=\"233\" data-end=\"267\"\u003eBuilt for marine environments:\u003c\/strong\u003e Designed with \u003cstrong data-start=\"282\" data-end=\"309\" data-is-only-node=\"\"\u003emarine-grade protection\u003c\/strong\u003e, it helps withstand moisture, UV exposure, and harsh outdoor conditions for reliable long-term use.\u003c\/li\u003e\n\u003cli data-section-id=\"x55sdr\" data-start=\"410\" data-end=\"566\"\u003e\n\u003cstrong data-start=\"412\" data-end=\"446\"\u003eEasy installation and control:\u003c\/strong\u003e The \u003cstrong data-start=\"451\" data-end=\"475\" data-is-only-node=\"\"\u003etop-mounted controls\u003c\/strong\u003e make tuning and adjustments quick and convenient, especially in tight installation spaces.\u003c\/li\u003e\n\u003cli data-section-id=\"7fk63p\" data-start=\"567\" data-end=\"728\"\u003e\n\u003cstrong data-start=\"569\" data-end=\"596\"\u003eClean, efficient sound:\u003c\/strong\u003e Its 2-channel design offers strong amplification with balanced audio output, improving bass response and overall listening quality.\u003c\/li\u003e\n\u003cli data-section-id=\"wgc2hj\" data-start=\"729\" data-end=\"910\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"731\" data-end=\"757\"\u003eExpert recommendation:\u003c\/strong\u003e A great choice for customers looking for a \u003cstrong data-start=\"801\" data-end=\"847\" data-is-only-node=\"\"\u003edurable, high-performance marine amplifier\u003c\/strong\u003e that combines power, reliability, and user-friendly operation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cp data-start=\"177\" data-end=\"478\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong data-start=\"177\" data-end=\"246\"\u003eQ: What is the MB Quart Discus 2 Channel Marine Amplifier 431770?\u003c\/strong\u003e\u003cbr data-start=\"246\" data-end=\"249\"\u003e\u003cstrong data-start=\"249\" data-end=\"255\"\u003eA:\u003c\/strong\u003e The MB Quart Discus DA2-500.2D is a waterproof 2-channel marine amplifier designed to deliver powerful, clean audio performance for boats, UTVs, motorcycles, and outdoor sound systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"480\" data-end=\"702\"\u003e\u003cstrong data-start=\"480\" data-end=\"537\"\u003eQ: How much power does this marine amplifier provide?\u003c\/strong\u003e\u003cbr data-start=\"537\" data-end=\"540\"\u003e\u003cstrong data-start=\"540\" data-end=\"546\"\u003eA:\u003c\/strong\u003e It delivers up to 500 watts of maximum power, with 2 x 250W at 2 ohms, 2 x 150W at 4 ohms, or 500W bridged at 4 ohms. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"704\" data-end=\"945\"\u003e\u003cstrong data-start=\"704\" data-end=\"755\"\u003eQ: Is the MB Quart Discus amplifier waterproof?\u003c\/strong\u003e\u003cbr data-start=\"755\" data-end=\"758\"\u003e\u003cstrong data-start=\"758\" data-end=\"764\"\u003eA:\u003c\/strong\u003e Yes. It features an IP67-rated waterproof and dustproof design with sealed components and waterproof connectors for harsh marine environments. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"947\" data-end=\"1204\"\u003e\u003cstrong data-start=\"947\" data-end=\"993\"\u003eQ: Does it have adjustable sound controls?\u003c\/strong\u003e\u003cbr data-start=\"993\" data-end=\"996\"\u003e\u003cstrong data-start=\"996\" data-end=\"1002\"\u003eA:\u003c\/strong\u003e Yes. The amplifier includes top-mounted controls, adjustable input sensitivity, bass boost, and variable electronic crossover settings for customized sound tuning. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1206\" data-end=\"1434\"\u003e\u003cstrong data-start=\"1206\" data-end=\"1261\"\u003eQ: What vehicles is this amplifier compatible with?\u003c\/strong\u003e\u003cbr data-start=\"1261\" data-end=\"1264\"\u003e\u003cstrong data-start=\"1264\" data-end=\"1270\"\u003eA:\u003c\/strong\u003e This compact Class D amplifier is ideal for marine boats, ATVs, UTVs, motorcycles, and other powersports audio installations. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1436\" data-end=\"1646\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1436\" data-end=\"1481\"\u003eQ: Why choose a Class D marine amplifier?\u003c\/strong\u003e\u003cbr data-start=\"1481\" data-end=\"1484\"\u003e\u003cstrong data-start=\"1484\" data-end=\"1490\"\u003eA:\u003c\/strong\u003e Class D technology provides efficient power output in a compact design while helping reduce heat and electrical load.\u003c\/p\u003e\n\u003ch5\u003e\n\u003cbr\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:eb2a1300-eec4-44d0-803a-001c483cee01-11\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-WEB:eb2a1300-eec4-44d0-803a-001c483cee01-11\" data-turn-id-container=\"request-WEB:eb2a1300-eec4-44d0-803a-001c483cee01-11\" data-testid=\"conversation-turn-2\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"66abf26f-66bc-4c52-b27d-26b698ccce55\" dir=\"auto\" data-message-model-slug=\"gpt-5-5-mini\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cul data-start=\"78\" data-end=\"818\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"3za4ho\" data-start=\"78\" data-end=\"182\"\u003eKeep the amplifier dry and clean; wipe away salt, moisture, and debris regularly to prevent corrosion.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"decicj\" data-start=\"183\" data-end=\"269\"\u003eCheck power, speaker, and RCA connections periodically to ensure secure performance.\u003c\/li\u003e\n\u003cli data-section-id=\"1eioijp\" data-start=\"270\" data-end=\"371\"\u003eInspect mounting hardware to confirm the amplifier remains firmly installed in marine environments.\u003c\/li\u003e\n\u003cli data-section-id=\"1ozd3df\" data-start=\"372\" data-end=\"462\"\u003eAvoid blocking ventilation areas to prevent overheating and maintain reliable operation.\u003c\/li\u003e\n\u003cli data-section-id=\"17jfvda\" data-start=\"463\" data-end=\"545\"\u003eUse a soft, dry cloth for cleaning; avoid harsh chemicals or abrasive materials.\u003c\/li\u003e\n\u003cli data-section-id=\"vym1gs\" data-start=\"546\" data-end=\"628\"\u003eCheck cables and terminals for wear, corrosion, or damage and replace as needed.\u003c\/li\u003e\n\u003cli data-section-id=\"nv86zj\" data-start=\"629\" data-end=\"733\"\u003eStore or protect the amplifier from prolonged exposure to extreme weather when the boat is not in use.\u003c\/li\u003e\n\u003cli data-section-id=\"7u0s7q\" data-start=\"734\" data-end=\"818\" data-is-last-node=\"\"\u003ePeriodically test audio output to identify distortion or performance issues early.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"MB Quart","offers":[{"title":"Default Title","offer_id":45829142675647,"sku":"431770","price":258.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/431770-main.jpg?v=1783516453","url":"https:\/\/www.mybackyardzone.com\/products\/mb-quart-discus-2-channel-marine-amplifier-with-top-mounted-controls-500-watts","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}