MHD900/5-24V - Receiver JL Audio - Free user manual and instructions
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| Product Type | Marine Amplifier |
| Model | MHD900/5-24V |
| Brand | JL Audio |
| Channels | 5 |
| RMS Power Rating (Total) | 900 W |
| Power Supply Voltage | 24V DC |
| Dimensions (L x W x H) | 13.5 x 8.5 x 2.2 in (343 x 216 x 56 mm) |
| Weight | 6.5 lb (2.95 kg) |
| Frequency Response | 10 Hz - 30 kHz |
| Signal-to-Noise Ratio | >104 dB |
| Input Sensitivity | 100 mV - 4 V |
| Certifications | Marine-grade, conformal coated PCB |
| Protection Features | Thermal, over-current, short circuit |
| Construction Material | Powder-coated aluminum heatsink |
| Recommended Use | Marine audio systems |
| Installation Type | Fixed mount |
| Cooling | Convection cooled |
| Warranty | 2 years (may vary) |
Frequently Asked Questions - MHD900/5-24V JL Audio
What is the RMS power output per channel?
The MHD900/5-24V delivers 75 W RMS x 4 at 4 ohms (full-range) and 300 W RMS x 1 at 4 ohms (subwoofer channel). At 2 ohms, the full-range channels output 100 W x 4 and the subwoofer channel outputs 500 W x 1.
Can this amplifier be used in a car with a 12V system?
No, the MHD900/5-24V is designed specifically for 24V electrical systems, commonly found in marine and heavy-duty vehicles. Using it on a 12V system will result in significantly reduced power output and may damage the amplifier.
What gauge power wire is recommended for installation?
A 4 AWG power and ground wire is recommended for the MHD900/5-24V to ensure adequate current flow and minimize voltage drop. Use a fuse of appropriate rating (e.g., 80A) near the battery.
Does the amplifier have built-in crossover filters?
Yes, the MHD900/5-24V features variable high-pass and low-pass crossovers (50-500 Hz) on the full-range channels, and a dedicated low-pass filter (50-500 Hz) on the subwoofer channel, allowing flexible system tuning.
Is the amplifier waterproof?
While the MHD900/5-24V is marine-grade with a conformal coated PCB and corrosion-resistant hardware, it is not fully submersible. It is designed to withstand moisture, humidity, and salt spray, but should be installed in a dry, ventilated location.
How do I properly set the gain levels?
Gain setting should be done using a digital multimeter or oscilloscope to match the amplifier's input sensitivity to the head unit's output voltage. Start with gains at minimum, then increase slowly while monitoring distortion. Overdriving the amplifier can cause clipping and speaker damage.
What is the minimum impedance load per channel?
The full-range channels are stable down to 2 ohms stereo (4 ohms bridged), and the subwoofer channel is stable down to 2 ohms. Operating below these impedances may trigger protection or cause damage.
Does the amplifier include a remote control?
No, the MHD900/5-24V does not include a remote control. An optional wired remote (sold separately) can be connected for volume control and configuration presets.
Can I power both speakers and a subwoofer with this amplifier?
Yes, the MHD900/5-24V is a 5-channel amplifier designed to power four full-range speakers (front/rear) and one subwoofer simultaneously, making it ideal for a complete marine audio system.
Where can I download the full user manual?
The full user manual for the MHD900/5-24V is available for free download on notice-facile.com in PDF format. You can also visit the JL Audio official website for additional support and documentation.
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USER MANUAL MHD900/5-24V JL Audio
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Product information
Brand : JL Audio
Model : MHD900/5-24V
Category : Receiver