{"product_id":"mb-quart-discus-5-channel-marine-amplifier-with-top-mounted-controls-500-watts","title":"MB Quart Discus 5 Channel Marine Amplifier with Top Mounted Controls, 500 Watts - 431771","description":"\u003ch2\u003eMB Quart Discus 5 Channel Marine Amplifier with Top Mounted Controls, 500 Watts - 431771\u003c\/h2\u003e\n\u003cp\u003eTake your marine audio system to the next level with the MB Quart Discus 5 Channel Marine Amplifier, engineered for powerful performance and rugged durability in harsh environments. Delivering up to 425 watts of clean, efficient power at 2 ohms of amp power and 290 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\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 4 channel amp delivers 4 x 50 +1 x 225W @ 2 ohm, 4 x 35 + 1 x150W @ 4 ohm, or 2 x 100W 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): 23.25 x 6.0 x 4.0 inches\u003c\/li\u003e\n\u003cli\u003eWeight: 6.1 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=\"1o3krl0\" data-start=\"28\" data-end=\"159\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"55\"\u003e5-channel versatility\u003c\/strong\u003e – Powers your full marine audio system, including speakers and a subwoofer, from one compact amplifier.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1em24bm\" data-start=\"160\" data-end=\"263\"\u003e\n\u003cstrong data-start=\"162\" data-end=\"191\"\u003e500 watts of clean output\u003c\/strong\u003e – Delivers balanced, reliable performance for clear sound on the water.\u003c\/li\u003e\n\u003cli data-section-id=\"8ek683\" data-start=\"264\" data-end=\"370\"\u003e\n\u003cstrong data-start=\"266\" data-end=\"290\"\u003eTop-mounted controls\u003c\/strong\u003e – Makes gain and crossover adjustments quick and convenient after installation.\u003c\/li\u003e\n\u003cli data-section-id=\"adexju\" data-start=\"371\" data-end=\"486\"\u003e\n\u003cstrong data-start=\"373\" data-end=\"396\"\u003eMarine-ready design\u003c\/strong\u003e – Built to withstand harsh boating environments while maintaining dependable performance.\u003c\/li\u003e\n\u003cli data-section-id=\"qbp5ye\" data-start=\"487\" data-end=\"609\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"489\" data-end=\"517\"\u003eGreat all-in-one upgrade\u003c\/strong\u003e – An excellent choice for cleaner sound, simplified wiring, and efficient system expansion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003e\n\u003cbr\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:d68d56ed-86be-4638-94f1-db0e8877ad20-0\" 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:d68d56ed-86be-4638-94f1-db0e8877ad20-0\" data-turn-id-container=\"request-WEB:d68d56ed-86be-4638-94f1-db0e8877ad20-0\" 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=\"d8449f42-687f-4278-be5b-2be5a22a74ee\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" 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\" 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\u003cp data-start=\"9\" data-end=\"280\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong data-start=\"9\" data-end=\"80\"\u003eQ: What is the MB Quart Discus 5 Channel Marine Amplifier used for?\u003c\/strong\u003e\u003cbr data-start=\"80\" data-end=\"83\"\u003eA: It powers multiple marine speakers and a subwoofer from one compact 5-channel amplifier, delivering enhanced sound performance on boats and marine vehicles. \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=\"282\" data-end=\"483\"\u003e\u003cstrong data-start=\"282\" data-end=\"339\"\u003eQ: How much power does this marine amplifier provide?\u003c\/strong\u003e\u003cbr data-start=\"339\" data-end=\"342\"\u003eA: It delivers up to 500 watts of maximum power with Class D efficiency for reliable audio performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"485\" data-end=\"722\"\u003e\u003cstrong data-start=\"485\" data-end=\"542\"\u003eQ: Is the amplifier suitable for marine environments?\u003c\/strong\u003e\u003cbr data-start=\"542\" data-end=\"545\"\u003eA: Yes, it features marine-focused construction with protected connectors and system protection features designed for boating applications. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"724\" data-end=\"929\"\u003e\u003cstrong data-start=\"724\" data-end=\"779\"\u003eQ: Can I adjust settings easily after installation?\u003c\/strong\u003e\u003cbr data-start=\"779\" data-end=\"782\"\u003eA: Yes, the top-mounted controls allow convenient access to sound adjustments without removing the amplifier. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"931\" data-end=\"1120\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"931\" data-end=\"974\"\u003eQ: Does it include protection features?\u003c\/strong\u003e\u003cbr data-start=\"974\" data-end=\"977\"\u003eA: Yes, built-in diagnostics help monitor issues such as overload and speaker shorts for safer operation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch5\u003eMaintenance Tips\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:15fe7131-5e31-460b-8cf4-9b2bd82a8b69-0\" 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:15fe7131-5e31-460b-8cf4-9b2bd82a8b69-0\" data-turn-id-container=\"request-WEB:15fe7131-5e31-460b-8cf4-9b2bd82a8b69-0\" 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=\"9e50105f-d699-4bde-a55b-91b1838b9fd1\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" 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=\"22\" data-end=\"444\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"17laean\" data-start=\"22\" data-end=\"111\"\u003eMount the amplifier in a dry, well-ventilated location away from direct water exposure.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"18i2532\" data-start=\"112\" data-end=\"188\"\u003eRinse with fresh water after saltwater use and wipe dry with a soft cloth.\u003c\/li\u003e\n\u003cli data-section-id=\"1n301ur\" data-start=\"189\" data-end=\"280\"\u003eRegularly inspect power, ground, speaker, and RCA connections for corrosion or looseness.\u003c\/li\u003e\n\u003cli data-section-id=\"pecz6l\" data-start=\"281\" data-end=\"353\"\u003eKeep ventilation areas free of dirt and debris to prevent overheating.\u003c\/li\u003e\n\u003cli data-section-id=\"1vcw80z\" data-start=\"354\" data-end=\"444\" data-is-last-node=\"\"\u003eAvoid exceeding the recommended speaker load and power ratings for reliable performance.\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":45829142741183,"sku":"431771","price":360.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/431771_main.jpg?v=1783516458","url":"https:\/\/www.mybackyardzone.com\/products\/mb-quart-discus-5-channel-marine-amplifier-with-top-mounted-controls-500-watts","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}