{"product_id":"jl-audio-xdm400-4-channel-marine-amplifier-400w","title":"JL Audio JLA-010-03115-00 XDM400\/4 4-Channel Marine Amplifier","description":"\u003ch2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\"\u003eUltra-compact 4-channel Class D amplification engineered for maximum power density with advanced NexD™ technology in a chassis that fits anywhere.\u003c\/h2\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eProduct Overview\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe JL Audio XDM400\/4 4-channel amplifier represents the ultimate space-efficient solution for marine and automotive installations requiring serious full-range power in the smallest possible footprint. Delivering 100W RMS per channel at 2Ω (400W total) or 75W per channel at 4Ω (300W total), this ultra-compact Class D platform drives four satellite speakers or two speakers plus a subwoofer from a chassis that fits under seats, behind helm panels, or in shallow equipment bays where traditional amplifiers won't mount. Built using JL Audio's advanced NexD™ high-speed switching design with full-bandwidth Class D operation, the XDM400\/4 achieves exceptionally low distortion and remarkable efficiency in marine-grade construction.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe versatile 4-channel configuration enables multiple system architectures: run all four channels independently for complete cabin\/cockpit coverage, bridge two channels for 200W to a subwoofer while driving two satellites, or pair with the XDM600\/1 monoblock for a stunning 1000W complete system (four satellites + subwoofer) that fits entirely under a seat. Variable 12dB\/octave filtering on both channel banks (channels 1\u0026amp;2 and 3\u0026amp;4) with continuously variable 50Hz-500Hz cutoff enables precise tuning for different speaker types. Automatic turn-on via signal sensing or DC-offset sensing simplifies factory system integration. With marine-grade materials, gasketed removable top cover, and exclusive dual-mode input filter, the XDM400\/4 delivers audiophile-grade performance in Australia's harshest coastal conditions.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eKey Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e4-channel Class D amplifier with NexD™ technology optimised for full-range applications\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\u003cstrong\u003eMaximum rated power (14.4V @ 2Ω, \u0026lt;1% THD): 100W RMS × 4 channels (400W total)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\u003cstrong\u003ePower at 4Ω load (14.4V @ 4Ω, \u0026lt;1% THD): 75W RMS × 4 channels (300W total)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\u003cstrong\u003eBridged power (14.4V @ 4Ω, \u0026lt;1% THD): 200W RMS × 2 channels (400W total bridged)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eOperating voltage: 11-14.5 VDC (12V systems only)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eUltra-compact chassis dimensions (specific measurements not provided in supplier data)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eWeight: Not specified\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAdvanced NexD™ high-speed switching design\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFull-bandwidth Class D operation with extremely low distortion\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMarine-grade materials construction\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eGasketed removable top cover protects controls\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eExclusive dual-mode input filter for noise-free performance\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAutomatic turn-on: Signal sensing or DC-offset sensing\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eVariable 12dB\/octave filters per channel bank\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFilter modes (Channels 1\u0026amp;2 and 3\u0026amp;4): Low-Pass or High-Pass\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFilter frequency range: 50Hz-500Hz (continuously variable)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRemote level control: Optional HD-RLC or MHD-RLC (water-resistant)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRemote level modes: All channels or rear channels only\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eBlack powder-coat finish\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e3-year manufacturer warranty (assumed standard XDM warranty)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Detailed technical specifications including power ratings at 12.5V, signal-to-noise ratio, damping factor, THD+N measurements, input voltage range, fuse rating, wire gauge requirements, and physical dimensions are not provided in supplier documentation.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eFeatures \u0026amp; Benefits\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eUltra-Compact Power Density\u003c\/strong\u003e\u003cbr\u003eThe XDM400\/4 delivers serious full-range power (100W × 4) in an ultra-compact chassis that fits locations where traditional amplifiers simply won't mount. Perfect for under-seat installations in boats with limited space, behind helm panels in centre console vessels, shallow cargo areas in dual-cab utes, or compact equipment bays in caravans. The small footprint doesn't compromise power output—JL Audio's NexD™ technology achieves full 400W capability in a package that disappears into tight installations.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eAdvanced NexD™ Full-Bandwidth Class D\u003c\/strong\u003e\u003cbr\u003eJL Audio's proprietary NexD™ high-speed switching design permits full-bandwidth Class D operation with extremely low distortion and remarkable efficiency. Unlike conventional Class D amplifiers compromised by switching artifacts at high frequencies, the NexD™ topology maintains clean, undistorted output across the entire audible spectrum from deep bass to high treble. The exceptional efficiency reduces current draw, minimizes heat generation, and enables reliable high-power output from the compact chassis—critical for space-constrained marine installations.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eVersatile System Configuration Options\u003c\/strong\u003e\u003cbr\u003eConfigure as a standalone 4-channel amp for complete cabin coverage, bridge two channels for 200W to a compact subwoofer while driving two satellites, or pair with the JL Audio XDM600\/1 monoblock for a complete 1000W system (four satellites + dedicated subwoofer) that fits entirely under a seat or deck. The modular approach provides upgrade flexibility: start with the XDM400\/4 for immediate needs, add the monoblock later for serious bass authority without replacing existing equipment.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eIndependent Channel Bank Filtering\u003c\/strong\u003e\u003cbr\u003eVariable 12dB\/octave filters on channels 1\u0026amp;2 and 3\u0026amp;4 enable precise system tuning. Configure as high-pass filters to protect speakers from damaging low frequencies, or low-pass filters for subwoofer duty when bridged. The continuously variable 50Hz-500Hz cutoff range accommodates marine coaxials, component speakers, and compact subwoofers. Independent filtering per channel bank allows front and rear speakers to operate at different frequency ranges, maximizing system performance without external crossovers.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eExclusive Dual-Mode Input Filter\u003c\/strong\u003e\u003cbr\u003eJL Audio's proprietary dual-mode input filter combined with differential-balanced circuitry delivers outstanding noise rejection and crystal-clear audio performance in boats or cars. The filter automatically adapts to electrical noise characteristics common in marine environments (alternator whine, bilge pump interference) or automotive installations (ignition noise, accessory interference). Critical for maintaining audiophile-grade sound quality in electrically noisy environments where conventional amplifiers produce audible interference.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eAutomatic Turn-On Capability\u003c\/strong\u003e\u003cbr\u003eDual-mode turn-on detection (signal sensing or DC-offset sensing) enables seamless integration with factory audio systems or aftermarket source units without separate remote turn-on wiring. Signal sensing detects audio signal on RCA inputs, while DC-offset sensing detects DC voltage from source unit output. Simplifies factory system upgrades in commercial vessels, charter boats, or vehicles where complex wiring modifications aren't practical or desirable.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eOptional Remote Level Control\u003c\/strong\u003e\u003cbr\u003eAdd JL Audio's HD-RLC or MHD-RLC (not included) for convenient output adjustment from the helm, driver's seat, or entertainment area. Switch between two modes: adjust all channels simultaneously (master volume control), or adjust rear channels only (preserve front speaker levels while controlling rear fill). Essential for marine applications where the amplifier is mounted in inaccessible equipment bays, or quick adjustments between moored and underway conditions.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eMarine-Grade Construction\u003c\/strong\u003e\u003cbr\u003eBuilt with marine-grade materials to withstand salt spray, bilge moisture, and corrosive coastal environments. The gasketed removable top cover protects controls and circuitry from moisture ingress while enabling easy access for tuning and adjustment. The black powder-coat finish resists corrosion in Australian conditions from tropical Queensland humidity to Southern Ocean salt spray. Suitable for protected equipment bays, under helm panels, or cabin locations with normal marine moisture exposure.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eTechnical Specs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAmplifier class:\u003c\/strong\u003e Class D (NexD™ high-speed switching design)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eChannels:\u003c\/strong\u003e 4 (Full-range)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eOperating voltage:\u003c\/strong\u003e 11-14.5 VDC (12V models only - NOT 24V compatible)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePower Output (14.4V input):\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eMaximum rated power (14.4V @ 2Ω, \u0026lt;1% THD):\u003c\/strong\u003e 100W RMS × 4 (400W total)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePower at 4Ω load (14.4V @ 4Ω, \u0026lt;1% THD):\u003c\/strong\u003e 75W RMS × 4 (300W total)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBridged power (14.4V @ 4Ω, \u0026lt;1% THD):\u003c\/strong\u003e 200W RMS × 2 (400W total bridged)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSignal Processing:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFilter modes (Channels 1\u0026amp;2 and 3\u0026amp;4):\u003c\/strong\u003e Low-Pass or High-Pass\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFilter slope:\u003c\/strong\u003e 12dB\/octave\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFilter frequency range:\u003c\/strong\u003e 50Hz-500Hz (continuously variable)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eExclusive dual-mode input filter:\u003c\/strong\u003e Yes (for noise rejection)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eProtection \u0026amp; Control:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eAutomatic turn-on:\u003c\/strong\u003e Signal sensing or DC-offset sensing\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRemote level control compatibility:\u003c\/strong\u003e Optional HD-RLC or MHD-RLC (water-resistant)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eRemote level modes:\u003c\/strong\u003e All channels or rear channels only\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePhysical Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Not specified (ultra-compact design)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e Not specified\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eConstruction:\u003c\/strong\u003e Marine-grade materials\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Gasketed removable top cover\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Black powder-coat\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 3 years (assumed standard XDM warranty)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eImportant Note:\u003c\/strong\u003e Detailed specifications including power ratings at 12.5V input, physical dimensions, weight, frequency response, signal-to-noise ratio, damping factor, THD+N measurements, input voltage range, fuse rating, and wire gauge requirements are not provided in available supplier documentation.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eCompatible With \/ Goes Well With\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSpeaker Recommendations:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMarine coaxial speakers rated 75-100W RMS (6\", 6.5\", 6×9\" sizes)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMarine component speaker systems rated 75-100W RMS per channel\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eCompact marine subwoofers rated 200W RMS (when bridging two channels)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eFull-range cabin speakers for complete coverage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eRecommended System Pairings:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eJL Audio XDM600\/1 monoblock (pair for complete 1000W system: 4 satellites + subwoofer)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eJL Audio XDM300\/1 monoblock (pair for 700W system: 4 satellites + 300W sub)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eInstallation Accessories:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMarine-grade amplifier wiring kit (gauge requirements not specified)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eJL Audio HD-RLC or MHD-RLC water-resistant remote level control\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMarine-grade speaker wire (14-16 AWG recommended for most runs)\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eRCA interconnect cables with marine-grade shielding\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eDistribution blocks for power\/ground distribution\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAmplifier mounting brackets for compact installations\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eSound deadening material for mounting surfaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eSystem Compatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eMarine head units with 2-4 channel preamp outputs\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eAftermarket head units with front\/rear preamp outputs\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003eLine output converters for factory radio integration\u003c\/li\u003e\n\u003cli class=\"whitespace-normal break-words pl-2\"\u003e12V electrical systems with adequate alternator capacity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCaution:\u003c\/strong\u003e Detailed specifications including fuse rating, wire gauge requirements, and physical dimensions are not provided in available documentation. Consult JL Audio technical support or authorized dealers before purchase to ensure proper electrical system sizing and installation space verification.\u003c\/p\u003e\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHow small is the XDM400\/4 compared to traditional 4-channel amplifiers?\u003c\/strong\u003e\u003cbr\u003eThe XDM400\/4 is described as \"ultra-compact\" with dimensions specifically designed to fit under seats, behind helm panels, or in shallow equipment bays. While exact measurements aren't provided in available documentation, it's engineered for installations where traditional amplifiers won't fit while still delivering 100W × 4 output.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eCan I run a subwoofer with this 4-channel amplifier?\u003c\/strong\u003e\u003cbr\u003eYes. Bridge channels 3+4 (or 1+2) for 200W RMS to a 4Ω compact subwoofer, leaving the other two channels unbridged for 75-100W to satellite speakers. This configuration is ideal for boats or vehicles requiring bass reinforcement without dedicating a separate monoblock amplifier in space-constrained installations.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eShould I pair this with the XDM600\/1 monoblock for a complete system?\u003c\/strong\u003e\u003cbr\u003eJL Audio specifically recommends this pairing to create a stunning 1000W amplification system (400W for four satellites from the XDM400\/4 plus 600W for subwoofer from the XDM600\/1) that fits entirely under a seat or deck. The modular approach provides clean installation, proper power distribution, and dedicated subwoofer control without compromising main speaker performance.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHow does the automatic turn-on work without a remote wire?\u003c\/strong\u003e\u003cbr\u003eThe amplifier features dual-mode detection: signal sensing (detects audio signal on RCA inputs) or DC-offset sensing (detects DC voltage from source unit output). Select the appropriate mode based on your source unit—signal sensing for most aftermarket units, DC-offset for many factory systems. Eliminates complex wiring in factory system upgrades.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat does the remote level control adjust?\u003c\/strong\u003e\u003cbr\u003eWith the optional HD-RLC or MHD-RLC remote, you can select between two modes: adjust all channels simultaneously (master volume for entire system), or adjust rear channels only (preserve front speaker levels while controlling rear fill intensity). The mode selection depends on your listening preferences and system configuration.\u003c\/p\u003e\u003ch2\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e\u003cstrong\u003eLegendary Products \u0026amp; Support From Authorized Dealers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\r\n\u003cp\u003eWhen you choose \u003cstrong\u003eFrankies BrandBeast\u003c\/strong\u003e, you're choosing quality and performance. But just as important as what you buy is \u003cstrong\u003ewhere\u003c\/strong\u003e you buy it from. Here's why purchasing from an \u003cstrong\u003eauthorized dealer\u003c\/strong\u003e is always the right choice:\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e▸ \u003cstrong\u003eExpert Knowledge \u0026amp; Training\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eOnly authorized \u003cstrong\u003eFrankies BrandBeast\u003c\/strong\u003e dealers are factory-trained to sell and install our products. They have the expertise to ensure your purchase is set up correctly and meets your expectations.\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e▸ \u003cstrong\u003eAuthorized Warranty Protection\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eWe offer one of the best warranties in the industry, but only purchases made through authorized dealers are covered. Don’t be misled by unauthorized sellers who can’t provide genuine warranty support.\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e\u003cstrong\u003e▸ Reliable Customer Support\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eIf you ever run into an issue, you’re backed by \u003cstrong\u003eFrankies BrandBeast’s\u003c\/strong\u003e official manufacturer’s warranty. No need to deal with overseas returns—our local team takes care of everything quickly and efficiently.\u003c\/p\u003e\r\n\u003cp\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e▸ \u003cstrong\u003eProtect Your Investment\u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003eBuying from an authorized dealer ensures you’re getting genuine products, full warranty coverage, and expert support. Ask yourself—is saving a few bucks worth losing all that?\u003c\/p\u003e\r\n\u003ch3\u003e\u003cspan style=\"color: rgb(0, 0, 128);\"\u003e\u003cstrong\u003eChoose wisely. Buy from Frankies BrandBeast today!\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\r\n\u003cp\u003e\u003cmeta charset=\"UTF-8\"\u003e \u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\u003c\/p\u003e\r\n\u003cstyle\u003e\n        h2, h3 {\n            color: #000080 !important;\n        }\n\n        h2 {\n            font-weight: bold;\n            margin-top: 1rem;\n            margin-bottom: 0.5rem;\n        }\n        h3 {\n            font-weight: bold;\n            margin-top: 1rem;\n            margin-bottom: 1rem;\n        }\n\u003c\/style\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":46216192884886,"sku":"JLA0100311500","price":1099.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0675\/0742\/1334\/files\/14a30024d12ed1baffac3088c4e8e289.webp?v=1769656953","url":"https:\/\/brandbeast.com.au\/products\/jl-audio-xdm400-4-channel-marine-amplifier-400w","provider":"Frankies BrandBeast","version":"1.0","type":"link"}