{"product_id":"gmr-rb4-4-channel-marine-audio","title":"MB Quart GMR-RB4 4-Channel Relay Bank for GMR7V1","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\"\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\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-8 [--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 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 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\"\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 dark markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\"\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\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-8 [--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 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 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\"\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 dark markdown-new-styling\"\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\"\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\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-8 [--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 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 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\"\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 dark markdown-new-styling\"\u003e\n\u003ch2 class=\"PDq2pG_selectionAnchorContainer\"\u003e🚤 MB Quart GMR-RB4 Marine Audio 4-Channel Relay Bank\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h2\u003e\n\u003cp\u003eThe MB Quart GMR-RB4 marine audio provides convenient accessory management for compatible recreational sound systems. This four-channel relay bank offers plug-and-play integration with the MB Quart GMR7V1 source unit.\u003c\/p\u003e\n\u003cp\u003eIt provides centralized control for compatible 12-volt accessories while supporting a cleaner \u003cstrong\u003eMarine Audio\u003c\/strong\u003e installation.\u003c\/p\u003e\n\u003ch2\u003e⚓ Designed for the MB Quart GMR7V1\u003c\/h2\u003e\n\u003cp\u003eThe GMR-RB4 is designed to integrate directly with the compatible GMR7V1 multimedia source unit.\u003c\/p\u003e\n\u003cp\u003eThis connection allows installers to organize accessory switching without adding several separate dashboard controls.\u003c\/p\u003e\n\u003cp\u003eKey features include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFour-channel relay bank\u003c\/li\u003e\n\u003cli\u003ePlug-and-play GMR7V1 integration\u003c\/li\u003e\n\u003cli\u003eFour independent accessory channels\u003c\/li\u003e\n\u003cli\u003eCentralized accessory switching\u003c\/li\u003e\n\u003cli\u003eCompatible 12-volt equipment control\u003c\/li\u003e\n\u003cli\u003eLighting system integration\u003c\/li\u003e\n\u003cli\u003eCompact installation design\u003c\/li\u003e\n\u003cli\u003eSimplified accessory wiring\u003c\/li\u003e\n\u003cli\u003ePowersports system applications\u003c\/li\u003e\n\u003cli\u003eCustom boat installation support\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThese features make the relay bank useful when expanding a recreational entertainment system.\u003c\/p\u003e\n\u003ch2\u003e💡 Control Multiple Accessories\u003c\/h2\u003e\n\u003cp\u003eCustom boats often include lighting and other electrical accessories beyond speakers and amplifiers.\u003c\/p\u003e\n\u003cp\u003eThe GMR-RB4 provides four relay channels for controlling compatible equipment.\u003c\/p\u003e\n\u003cp\u003eIndependent channels also provide greater flexibility when configuring a custom installation.\u003c\/p\u003e\n\u003ch2\u003e🎛️ Plug-and-Play Integration\u003c\/h2\u003e\n\u003cp\u003eComplicated accessory wiring can make upgrading a boat or powersports vehicle more difficult.\u003c\/p\u003e\n\u003cp\u003eProfessional installation remains recommended for power wiring, circuit protection, and accessory connections.\u003c\/p\u003e\n\u003cp\u003eProper fusing and wire sizing are important for reliable electrical performance.\u003c\/p\u003e\n\u003ch2\u003e🔊 Complete Your Entertainment System\u003c\/h2\u003e\n\u003cp\u003eThe GMR-RB4 does not amplify speakers or subwoofers.\u003c\/p\u003e\n\u003cp\u003eInstead, it handles accessory switching within compatible installations.\u003c\/p\u003e\n\u003cp\u003eA complete system can include a multimedia receiver, marine speakers, amplifiers, lighting, and dedicated bass equipment.\u003c\/p\u003e\n\u003cp\u003eFor additional low-frequency options, \u003cstrong\u003e\u003ca rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/audiojamonline.com\/collections\/car-subwoofers\"\u003eexplore our Car Subwoofers collection\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eDedicated bass equipment can provide deeper sound while full-range speakers handle vocals and instruments.\u003c\/p\u003e\n\u003cp\u003eThis combination creates a more complete entertainment experience during recreational activities.\u003c\/p\u003e\n\u003ch2\u003e🌊 Useful for Marine and Powersports Builds\u003c\/h2\u003e\n\u003cp\u003eBoats and UTVs often require electrical accessories to operate alongside their sound equipment.\u003c\/p\u003e\n\u003cp\u003eThe GMR-RB4 provides an organized solution for controlling compatible 12-volt accessories.\u003c\/p\u003e\n\u003cp\u003eIts four-channel design offers flexibility for custom lighting and electrical configurations.\u003c\/p\u003e\n\u003cp\u003eThis makes it useful for \u003cstrong\u003eMarine Audio\u003c\/strong\u003e, powersports audio, and other recreational entertainment installations.\u003c\/p\u003e\n\u003cp\u003eAlways verify the electrical requirements of each connected accessory before completing installation.\u003c\/p\u003e\n\u003ch2\u003e⭐ Why Choose the MB Quart GMR-RB4?\u003c\/h2\u003e\n\u003cp\u003eThe GMR-RB4 combines four-channel relay control with direct GMR7V1 integration.\u003c\/p\u003e\n\u003cp\u003eIts compact configuration helps reduce unnecessary switches while keeping accessory management organized.\u003c\/p\u003e\n\u003cp\u003eIt provides a practical addition for custom boat, UTV, and recreational audio installations.\u003c\/p\u003e\n\u003cp\u003eComplete your vehicle upgrades with professional \u003cstrong\u003e\u003ca rel=\"noopener\" class=\"decorated-link\" href=\"https:\/\/windowtintdelaware.com\/\"\u003ecar window tinting\u003c\/a\u003e\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003e1. What does the GMR-RB4 do?\u003c\/h3\u003e\n\u003cp\u003eIt provides four relay channels for controlling compatible accessories through a properly configured GMR7V1 system.\u003c\/p\u003e\n\u003ch3\u003e2. Is the GMR-RB4 a Marine Audio amplifier?\u003c\/h3\u003e\n\u003cp\u003eNo. It controls compatible electrical accessories rather than amplifying the audio signal sent to speakers.\u003c\/p\u003e\n\u003ch3\u003e3. Does the GMR-RB4 work with the GMR7V1?\u003c\/h3\u003e\n\u003cp\u003eYes. It is designed for plug-and-play integration with the compatible MB Quart GMR7V1 source unit.\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 has-[\u0026gt;_:empty]:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\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\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\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\/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":55951508111665,"sku":"GMR-RB4","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0730\/6146\/6417\/files\/gmr-rb4-4-channel-gmr7v1.png?v=1787758933","url":"https:\/\/audiojamonline.com\/products\/gmr-rb4-4-channel-marine-audio","provider":"Audio Jam Inc","version":"1.0","type":"link"}