{"product_id":"jl-audio-mediamaster-source-unit-010-03372-00","title":"JL Audio MM55-HR Hidden Marine Source Unit w\/ 4-Channel Amp 010-03372-00 (99977)","description":"\u003cp\u003e\u003cstrong\u003eJL Audio MediaMaster MM55-HR\u003c\/strong\u003e is a premium hidden marine source unit with a built-in 4-channel amplifier and multi-zone control, designed for vessels where the “brain” of the system is tucked away and controlled from remote locations or an MFD. It delivers high-fidelity audio, full 3-zone management, and extensive connectivity while keeping the dash clean and focused on helm controls.\u003c\/p\u003e\n\u003cp\u003eThis hideaway receiver includes a 25W x 4 (100W total) built-in amplifier for Zones 1 and 2, plus \u003cstrong\u003enine channels of 4V preamp outputs\u003c\/strong\u003e across three audio zones, each with its own dedicated subwoofer output. With Bluetooth® streaming, global AM\/FM tuner, USB audio, analog AUX input, and NMEA 2000® network connectivity, the MM55-HR is built to be the centralized audio hub for serious marine systems.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium hidden marine source unit with built-in 4-channel amplifier\u003c\/li\u003e\n\u003cli\u003eUp to three independent audio zones, each with its own subwoofer output\u003c\/li\u003e\n\u003cli\u003eNine channels of 4V preamp outputs (front\/rear\/sub per zone)\u003c\/li\u003e\n\u003cli\u003eIntegrated Bluetooth® audio streaming with high-fidelity codec support\u003c\/li\u003e\n\u003cli\u003eGlobal AM\/FM tuner with preset storage\u003c\/li\u003e\n\u003cli\u003eRear USB 2.0 input for music files and device charging\u003c\/li\u003e\n\u003cli\u003eRear stereo AUX RCA input for external sources\u003c\/li\u003e\n\u003cli\u003eNMEA 2000® compatible for control via supported MFDs or JL network remotes\u003c\/li\u003e\n\u003cli\u003eIP67-rated water-resistant design for real marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMediaMaster MM55-HR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e010-03372-00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBuilt-In Amplifier\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e25W RMS x 4 @ 4Ω (Zones 1 \u0026amp; 2)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePreamp Outputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e9 channels, 4V RMS (front\/rear\/sub for Zones 1–3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eZones\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e3 independent audio zones with dedicated sub outputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBluetooth audio, AM\/FM tuner, rear USB, rear stereo AUX RCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNetwork\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNMEA 2000® compliant (MFD and network remote control)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePreout Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4V RMS (selectable fixed output levels where applicable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10 – 16 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRecommended Fuse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandby Current Draw\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 100 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e-4°F to +149°F (-20°C to +65°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater Resistance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIP67-rated marine construction\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePhysical Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 7.7\" W × 5.0\" D × 2.3\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eZone \u0026amp; Audio Management\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThree discrete audio zones with individual level control\u003c\/li\u003e\n\u003cli\u003eDedicated subwoofer level control per zone\u003c\/li\u003e\n\u003cli\u003eOnboard crossovers per zone (selectable high-pass and low-pass points)\u003c\/li\u003e\n\u003cli\u003eIndependent tone controls (bass, midrange, treble, balance)\u003c\/li\u003e\n\u003cli\u003eZone naming for easy identification on compatible controllers\u003c\/li\u003e\n\u003cli\u003eZone volume limits to cap maximum output in specific areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eControl \u0026amp; Integration\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned to be controlled via JL MediaMaster MMR-40 network controller (sold separately)\u003c\/li\u003e\n\u003cli\u003eCompatible with supported NMEA 2000® multifunction displays for on-screen audio control\u003c\/li\u003e\n\u003cli\u003eWorks with JL Audio wired and wireless remote options (sold separately)\u003c\/li\u003e\n\u003cli\u003eMediaMaster Remote app support for smartphone-based control (where available)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eIdeal Applications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium multi-zone marine audio systems\u003c\/li\u003e\n\u003cli\u003eCenter-console, cruiser, yacht, and pontoon installs needing a hidden source\u003c\/li\u003e\n\u003cli\u003eSystems built around MFD control instead of a traditional head unit on the dash\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhat’s in the Box\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJL Audio MediaMaster MM55-HR hidden source unit\u003c\/li\u003e\n\u003cli\u003ePower \/ speaker \/ preout harness\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003cli\u003eDocumentation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eWhy Buy From MCOR Automotive\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAuthorized JL Audio dealer\u003c\/li\u003e\n\u003cli\u003eReal-world marine and powersports system design experience\u003c\/li\u003e\n\u003cli\u003eSupport for multi-zone, MFD-controlled audio architectures\u003c\/li\u003e\n\u003cli\u003e20+ years in high-end 12-volt and marine integration\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":51808022233367,"sku":"010-03372-00","price":379.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/3185\/7431\/files\/1_a6f06eca-0a9c-4f50-9596-15b24c943f84.webp?v=1768532990","url":"https:\/\/shop.mcorautomotive.com\/products\/jl-audio-mediamaster-source-unit-010-03372-00","provider":"shop.mcorautomotive.com","version":"1.0","type":"link"}