{"product_id":"mb-quart-8-subwoofer-upgrade-for-21-24-ford-bronco-tuned-audio-package-400w","title":"MB Quart 8\" Subwoofer Upgrade for 21-24 Ford Bronco, Tuned Audio Package, 400W - 427503","description":"\u003ch2\u003eMB Quart 8\" Subwoofer Upgrade for 21-24 Ford Bronco, Tuned Audio Package, 400W - 427503\u003c\/h2\u003e\n\u003cp\u003eElevate your driving experience with the MB Quart Subwoofer Upgrade, a tuned audio package engineered exclusively for the 2021–2024 Ford Bronco equipped with the OEM B\u0026amp;O sound system. Designed to deliver deeper bass, cleaner response, and higher output, this system brings your Bronco’s audio performance to life with powerful low-end clarity that factory equipment simply can’t match.\u003c\/p\u003e\n\u003cp\u003eAt the heart of the upgrade is an 8-inch, application-specific long-throw subwoofer designed for maximum output in the Bronco’s OEM B\u0026amp;O enclosure. Tuned for precision and punch, it delivers a frequency response of 50Hz to 250Hz, adding fullness and tight, accurate bass to your music. With a sensitivity of 89 dB and a 2-ohm impedance, it efficiently converts power into impactful sound, ideal for everything from rock and country to hip-hop and electronic.\u003c\/p\u003e\n\u003cp\u003ePowering this performance is a compact yet robust 400-watt Class-D NA2 amplifier. Engineered for high efficiency and low current draw, it provides clean, controlled power with onboard equalization to ensure the subwoofer performs at its peak. Despite its impressive output, the amp’s small chassis is easy to mount and integrates seamlessly into the vehicle. A powder-coated mounting plate ensures secure placement and long-term durability, even in rugged off-road environments.\u003c\/p\u003e\n\u003cp\u003eInstallation is designed to be straightforward: the system uses the Bronco’s OEM B\u0026amp;O subwoofer enclosure, existing hardware, and a dedicated subwoofer-to-amplifier harness. With basic hand tools, the upgrade can be completed cleanly without vehicle modification.\u003c\/p\u003e\n\u003cp\u003eWhether you're cruising the highway or hitting the trails, the MB Quart 8\" Subwoofer Upgrade delivers a richer, more immersive listening experience, transforming your Bronco’s audio system into the powerful, full-bodied sound package it was meant to be.\u003c\/p\u003e\n\u003ch5\u003eFeatures\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for 2021–2024 Ford Bronco models with the OEM B\u0026amp;O system, using the factory subwoofer enclosure and hardware for a seamless upgrade\u003c\/li\u003e\n\u003cli\u003e8\" long-throw sub delivers tight, powerful bass with a 50–250Hz frequency range, 89 dB sensitivity, and 2-ohm wiring for efficient performance\u003c\/li\u003e\n\u003cli\u003eCompact 400W Class-D amplifier provides clean, efficient power with onboard EQ, low current draw, and a small chassis that fits easily\u003c\/li\u003e\n\u003cli\u003eIncludes a dedicated subwoofer-to-amplifier harness and mounts using OEM locations; requires only basic hand tools for a clean, no-mod setup\u003c\/li\u003e\n\u003cli\u003eAmplifier secures to a powder-coated mounting plate for long-lasting stability, even during rugged driving or off-road use\u003c\/li\u003e\n\u003cli\u003eThis system upgrades the OEM B\u0026amp;O audio subwoofer and requires the OEM 8\" subwoofer enclosure. Plug \u0026amp; Play with any of the MB Quart STAGE 6 Ford Bronco Tuned Audio Systems. Additional parts needed if not pairing with an MB Quart Tuned Audio System please consult professional installer.\u003c\/li\u003e\n\u003cli\u003eColor: black\u003c\/li\u003e\n\u003cli\u003eDimensions (L x W x H): 12.25 x 12.25 x 11.38 inches\u003c\/li\u003e\n\u003cli\u003eWeight: 10.6 pounds\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch5\u003eWhat our Experts Think\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:a2f5dd7d-e80e-4efc-80d1-5cf1c544d9d6-7\" 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:a2f5dd7d-e80e-4efc-80d1-5cf1c544d9d6-7\" data-turn-id-container=\"request-WEB:a2f5dd7d-e80e-4efc-80d1-5cf1c544d9d6-7\" data-testid=\"conversation-turn-14\" 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=\"2a967ded-a783-4f8d-9fb3-ea68c4a803a6\" 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=\"28\" data-end=\"841\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"7p0why\" data-start=\"28\" data-end=\"122\"\u003e\n\u003cstrong data-start=\"30\" data-end=\"75\"\u003eVehicle-specific 8-inch subwoofer upgrade\u003c\/strong\u003e designed for \u003cstrong data-start=\"89\" data-end=\"114\" data-is-only-node=\"\"\u003e2021-2024 Ford Bronco\u003c\/strong\u003e models.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1xfcsrf\" data-start=\"123\" data-end=\"213\"\u003e\n\u003cstrong data-start=\"125\" data-end=\"148\"\u003e400W power handling\u003c\/strong\u003e delivers deep, powerful bass with improved low-frequency impact.\u003c\/li\u003e\n\u003cli data-section-id=\"55wlq\" data-start=\"214\" data-end=\"322\"\u003e\n\u003cstrong data-start=\"216\" data-end=\"239\"\u003eTuned audio package\u003c\/strong\u003e provides optimized sound performance with cleaner and more balanced bass response.\u003c\/li\u003e\n\u003cli data-section-id=\"1sw8ugn\" data-start=\"323\" data-end=\"416\"\u003e\n\u003cstrong data-start=\"325\" data-end=\"343\"\u003eCompact design\u003c\/strong\u003e adds premium bass performance while maintaining valuable interior space.\u003c\/li\u003e\n\u003cli data-section-id=\"19jeakv\" data-start=\"417\" data-end=\"513\"\u003e\n\u003cstrong data-start=\"419\" data-end=\"456\"\u003eEnhanced factory audio experience\u003c\/strong\u003e brings more depth and excitement to your favorite music.\u003c\/li\u003e\n\u003cli data-section-id=\"1we70tp\" data-start=\"514\" data-end=\"623\"\u003e\n\u003cstrong data-start=\"516\" data-end=\"547\"\u003eBuilt for Bronco adventures\u003c\/strong\u003e with durable construction suited for daily driving and off-road conditions.\u003c\/li\u003e\n\u003cli data-section-id=\"49xw4i\" data-start=\"624\" data-end=\"740\"\u003e\n\u003cstrong data-start=\"626\" data-end=\"646\"\u003eEasy integration\u003c\/strong\u003e makes it a smart upgrade for Bronco owners seeking stronger bass without a full custom build.\u003c\/li\u003e\n\u003cli data-section-id=\"1e20ypx\" data-start=\"741\" data-end=\"841\" data-is-last-node=\"\"\u003e\n\u003cstrong data-start=\"743\" data-end=\"774\"\u003eIdeal for music enthusiasts\u003c\/strong\u003e who want a richer, more immersive in-vehicle listening experience.\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\n\u003ch5\u003eQ\u0026amp;A\u003c\/h5\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-WEB:b7d1ca7c-5a18-46fc-a0cd-bf0a6b67e5cc-5\" 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:b7d1ca7c-5a18-46fc-a0cd-bf0a6b67e5cc-5\" data-turn-id-container=\"request-WEB:b7d1ca7c-5a18-46fc-a0cd-bf0a6b67e5cc-5\" data-testid=\"conversation-turn-12\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-3 [--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=\"fb7d1b07-ff96-4d13-9cdc-8a6a0e56cdb5\" data-turn-start-message=\"true\" 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\" 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=\"0\" data-end=\"243\" class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong data-start=\"0\" data-end=\"73\"\u003eQ: What Ford Bronco models is this subwoofer upgrade compatible with?\u003c\/strong\u003e\u003cbr data-start=\"73\" data-end=\"76\"\u003eA: It is designed for \u003cstrong data-start=\"98\" data-end=\"169\"\u003e2021–2024 Ford Bronco models equipped with the OEM B\u0026amp;O audio system\u003c\/strong\u003e for a direct factory-style upgrade. \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=\"245\" data-end=\"467\"\u003e\u003cstrong data-start=\"245\" data-end=\"305\"\u003eQ: What power output does this subwoofer system provide?\u003c\/strong\u003e\u003cbr data-start=\"305\" data-end=\"308\"\u003eA: The system delivers \u003cstrong data-start=\"331\" data-end=\"353\"\u003e400 watts of power\u003c\/strong\u003e through a compact Class-D amplifier for stronger, cleaner bass performance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"469\" data-end=\"685\"\u003e\u003cstrong data-start=\"469\" data-end=\"508\"\u003eQ: What size subwoofer is included?\u003c\/strong\u003e\u003cbr data-start=\"508\" data-end=\"511\"\u003eA: It features an \u003cstrong data-start=\"529\" data-end=\"560\"\u003e8-inch long-throw subwoofer\u003c\/strong\u003e engineered to provide deeper bass, improved low-frequency response, and higher output. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"687\" data-end=\"913\"\u003e\u003cstrong data-start=\"687\" data-end=\"735\"\u003eQ: Does it use the factory Bronco enclosure?\u003c\/strong\u003e\u003cbr data-start=\"735\" data-end=\"738\"\u003eA: Yes. The upgrade is designed to use the \u003cstrong data-start=\"781\" data-end=\"835\"\u003eOEM B\u0026amp;O subwoofer enclosure and mounting locations\u003c\/strong\u003e for a clean, space-saving installation. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"915\" data-end=\"1223\"\u003e\u003cstrong data-start=\"915\" data-end=\"952\"\u003eQ: Is installation plug-and-play?\u003c\/strong\u003e\u003cbr data-start=\"952\" data-end=\"955\"\u003eA: Yes. It includes a dedicated subwoofer-to-amplifier harness and installs with factory hardware locations. It is plug-and-play with compatible MB Quart Bronco tuned audio systems; additional parts may be needed for other setups. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1225\" data-end=\"1462\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\u003cstrong data-start=\"1225\" data-end=\"1268\"\u003eQ: What sound improvement can I expect?\u003c\/strong\u003e\u003cbr data-start=\"1268\" data-end=\"1271\"\u003eA: The MB Quart 427503 upgrade delivers \u003cstrong data-start=\"1311\" data-end=\"1387\"\u003edeeper bass, improved clarity, and a more immersive listening experience\u003c\/strong\u003e compared with the factory subwoofer. \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\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:b6d4b5da-45fd-4bb0-a4e4-d076f6f1f692-6\" 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:b6d4b5da-45fd-4bb0-a4e4-d076f6f1f692-6\" data-turn-id-container=\"request-WEB:b6d4b5da-45fd-4bb0-a4e4-d076f6f1f692-6\" data-testid=\"conversation-turn-12\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-3 [--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=\"c93a47ce-6c43-45ae-9e22-4e857b6f3133\" 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=\"22\" data-end=\"542\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"pbj4tt\" data-start=\"22\" data-end=\"118\"\u003eClean the subwoofer enclosure and grille with a soft microfiber cloth to prevent dust buildup.\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1e08tzm\" data-start=\"119\" data-end=\"204\"\u003eInspect wiring, connectors, and mounting hardware regularly for secure connections.\u003c\/li\u003e\n\u003cli data-section-id=\"1xvyex4\" data-start=\"205\" data-end=\"290\"\u003eAvoid excessive volume levels or distortion to protect the subwoofer and amplifier.\u003c\/li\u003e\n\u003cli data-section-id=\"19a3t72\" data-start=\"291\" data-end=\"382\"\u003eKeep the audio components dry and avoid direct exposure to water or high-pressure sprays.\u003c\/li\u003e\n\u003cli data-section-id=\"78hta9\" data-start=\"383\" data-end=\"461\"\u003eCheck for loose parts or debris after off-road driving or heavy vehicle use.\u003c\/li\u003e\n\u003cli data-section-id=\"1uxkanq\" data-start=\"462\" data-end=\"542\" data-is-last-node=\"\"\u003eProtect the system from extreme heat and prolonged sun exposure when possible.\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":45828994793663,"sku":"427503","price":274.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0683\/5703\/0079\/files\/427503-main.jpg?v=1783514871","url":"https:\/\/www.mybackyardzone.com\/products\/mb-quart-8-subwoofer-upgrade-for-21-24-ford-bronco-tuned-audio-package-400w","provider":"Your Outdoor Setup Starts Here","version":"1.0","type":"link"}