Description
JL Audio JLA-010-03104-00 MHD Marine Amplifier - 4 Channel Full-Range 24V Marine Amplifier
Professional 24-volt marine amplification with IP67 protection — MHD 4-channel amplifier delivers 150 watts per channel with Class-D efficiency and advanced signal processing for commercial vessels, charter boats, and larger yachts operating 24V electrical systems across Australian waters.
Product Overview
The JL Audio MHD 4-channel marine amplifier delivers professional-grade audio amplification specifically engineered for 24-volt marine electrical systems with 150 watts RMS per channel at 4Ω impedance (300 watts bridged) and 600 watts total continuous power output. Designed with full IP67 dust and water ingress protection, this Class-D amplifier features variable high-pass and low-pass filters with selectable 12/24 dB per octave slopes, detented calibrated crossover controls, switchable 2-channel or 4-channel input modes, and optional HD-RLC remote level control compatibility. Operating across 22-29V DC voltage range with comprehensive thermal, overload, and short-circuit protection, the compact chassis (273mm x 199mm x 49mm) enables professional installation in equipment compartments, helm consoles, or below-deck locations. Compatible with JL Audio MediaMaster source units, M3/M6 marine speakers, marine subwoofers, and enclosed tower systems, this amplifier serves commercial fishing vessels, charter boats, larger recreational yachts, and marine applications requiring robust 24-volt amplification with three-year warranty coverage.
Features & Benefits
24-Volt Marine System Optimization: Specifically engineered for 24V DC electrical systems (22-29V operating range) common in commercial vessels, larger yachts, and professional marine applications, delivering consistent 150W x 4 RMS power output at both 4Ω and 2Ω loads across voltage fluctuations typical in marine environments.
Complete IP67 Environmental Protection: Full dust and water ingress protection withstands direct saltwater spray, submersion during washdown, bilge water exposure, and harsh marine conditions without requiring additional protective enclosures, ensuring reliable operation in demanding Australian coastal and offshore environments with three-year warranty coverage.
Advanced Class-D Efficiency: High-efficiency Class-D topology minimizes heat generation and power consumption while delivering maximum output capability, reducing strain on vessel electrical systems and enabling compact chassis design fitting tight installation spaces common in marine equipment compartments.
Professional Signal Processing: Variable high-pass and low-pass filters with selectable 12/24 dB per octave slopes and 50-500 Hz frequency range enable precise speaker and subwoofer integration, while detented calibrated potentiometers provide accurate repeatable crossover settings for professional system tuning and multi-amplifier installations.
Flexible Channel Configuration: Switchable 2-channel or 4-channel input modes with bridged output capability (300W x 2) accommodate diverse system architectures from simple stereo installations to complex multi-zone configurations, while buffered pass-through preamp outputs enable daisy-chaining multiple amplifiers for expanded systems.
Remote Level Control Ready: Optional HD-RLC remote level control compatibility (2-channel or all-channels mode) provides convenient volume adjustment from helm, cockpit, or cabin positions without accessing amplifier controls in equipment compartments, simplifying operation during underway conditions.
Technical Specs
| Specification |
Details |
| Model |
MHD 4-Channel (24V System) |
| Amplifier Class |
Class-D |
| Channels |
4-channel full-range |
| Total Power Output |
600W RMS continuous |
| RMS Power @ 4Ω |
150W x 4 (28.8V input, <1% THD) |
| RMS Power @ 2Ω |
150W x 4 (28.8V input, <1% THD) |
| Bridged Power @ 4Ω |
300W x 2 |
| Operating Voltage |
22-29V DC (24V systems) |
| Physical Dimensions |
273mm W x 199mm D x 49mm H (10.74" x 7.85" x 1.93") |
| Weight |
Approximately 3.0 kg (6.6 lbs) |
| Dust/Water Rating |
IP67 (full protection) |
| Signal-to-Noise Ratio |
>110 dB below rated power (A-weighted) |
| Damping Factor @ 4Ω |
>300 at 50 Hz |
| Damping Factor @ 2Ω |
>150 at 50 Hz |
| THD+N @ Rated Power |
<0.03% @ 4Ω |
| Frequency Response |
6 Hz - 30 kHz (+0, -1dB) |
| Input Voltage Range |
Switchable: 200mV-2V RMS (low) or 800mV-8V RMS (high) |
| Filter Modes (Ch 1-4) |
Off, Low-Pass, or High-Pass |
| Filter Slopes |
Selectable 12/24 dB per octave |
| Filter Frequency Range |
50 Hz - 500 Hz |
| Crossover Controls |
Detented calibrated potentiometers |
| Channel Input Mode |
Switchable 2/4 channels |
| Preamp Outputs |
Buffered pass-through with source selection |
| Remote Level Control |
Optional HD-RLC (2 or all channels) |
| Fuse Rating (24V) |
25 amps |
| Recommended Fuse Type |
AFS, AGU, or MaxiFuse |
| Power Wire Gauge |
Minimum 4 AWG copper |
| Warranty |
3 years manufacturer warranty |
Compatible With / Goes Well With
JL Audio Marine Speakers: M3 marine speakers (6.5", 7.7", 8.8" coaxials), M6 marine speakers (6.5", 7.7", 8.8" coaxials), M3/M6 enclosed tower speakers receiving 150W RMS per speaker for high-output marine audio across commercial and recreational vessels.
JL Audio Marine Subwoofers: M3 marine subwoofers, M6 marine subwoofers (8" and 10"), M6 marine thin-line subwoofers, M7 marine subwoofers running in bridged mode (300W x 2) for dedicated low-frequency reinforcement in multi-amplifier systems.
JL Audio Source Units: MediaMaster 105 marine stereo, MediaMaster 55 marine stereo, JL Audio marine receivers with 4-volt preamp outputs providing high-voltage signal transmission for optimal noise rejection and amplifier matching.
Tower Speaker Systems: JL Audio VeX enclosed tower systems, M3/M6 enclosed tower speakers requiring high-power amplification for wakeboarding, water sports, and offshore entertainment with long cable runs to tower-mounted speakers.
Installation Accessories: 24V marine-grade amplifier wiring kits (4-gauge minimum), 25A fuses (AFS/AGU/MaxiFuse), marine distribution blocks, HD-RLC remote level control, waterproof RCA cables, sealed wire connectors for professional 24V system integration.
Frequently Asked Questions
Why would I need a 24-volt amplifier instead of 12-volt? 24-volt electrical systems are standard in larger commercial vessels, charter boats, and yachts over 40 feet requiring increased electrical capacity for house loads, navigation equipment, and multiple high-power accessories. The 24V MHD amplifier integrates directly with these vessel electrical systems without requiring voltage converters or dual-battery configurations.
Can this amplifier be used in 12-volt systems? No, the 24V model (JLA-010-03104-00) is specifically engineered for 22-29V DC operation and cannot be used in 12V systems. JL Audio offers separate 12V MHD models for standard marine applications. Verify your vessel's electrical system voltage before purchasing.
What's the advantage of IP67 rating over standard marine amplifiers? IP67 provides complete protection against dust ingress and submersion up to 1 meter for 30 minutes, exceeding typical marine "water-resistant" ratings. This enables installation in exposed locations, bilge areas, or equipment compartments subject to washdown without additional protective enclosures.
Can I bridge all four channels to create two 600W outputs? No, bridging creates two channels at 300W each (600W total). Channels 1+2 bridge together and channels 3+4 bridge together, each delivering 300W RMS at 4Ω impedance. This configuration is ideal for powering two subwoofers or two high-power speaker pairs.
Do I need the optional HD-RLC remote level control? The HD-RLC is optional but recommended for convenient volume adjustment from helm or cockpit positions without accessing amplifier controls in equipment compartments. It can control either 2 channels or all 4 channels simultaneously, depending on your preference and system configuration.
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