JL Audio XDM300/1 Marine Amplifier

The JL Audio XDM300/1 is a Class D mono amplifier. It is designed to deliver 300 watts RMS, making it ideal for powering a subwoofer.

This amplifier is specifically designed for use in marine and automotive environments, providing robustness and reliability suited to these conditions.

This product must be used exclusively with 12-volt negative-ground electrical systems. The amplifier must be securely mounted to prevent damage or injury. A suitable fuse or circuit breaker is required on the main power cable and must be installed within 45 cm (18 inches) of the battery’s positive terminal.

The amplifier must be installed in a dry, well-ventilated location that does not interfere with factory-installed systems. Avoid installation in the engine compartment, in areas of extreme heat, or where it would be directly exposed to the elements.

For the positive connection (+12VDC) and ground (GND), a 4 AWG cable is recommended (8 AWG minimum for +12VDC). For the remote activation connection (Remote), a 18 to 12 AWG cable is required.

The JL Audio XDM300/1 amplifier can support a minimum impedance load of 2 ohms (≥2 ohms) for the subwoofer output.

Green flashing: The amplifier is starting, the audio output is muted.Green solid: Normal operation, audio output active.Red solid: Safety mode, overheating condition, audio output reduced. The amplifier returns to normal when the temperature drops.Yellow solid: Safety mode, overcurrent condition, audio output muted. This may indicate a short circuit in the speaker/cable or low impedance.LEDs off: The amplifier is shut down (unexpectedly), low voltage condition (below 10V). It returns to normal above 11V.

The amplifier has three ignition modes:

Remote: Ignition via a switched +12V circuit or the ignition output of your audio source. This is the preferred method.DC Offset (Automatic): Ignition by detecting a small DC signal in the OEM audio outputs (high level only) and turns off after the signal is removed.Signal-Sensing (Automatic): Ignition by detecting full-range OEM audio signals and turns off after the signal is removed (within 30 seconds).Using the DC Offset or Signal-Sensing methods will convert the "Remote" terminal into a +12V ignition output.

Yes, the JL Audio XDM300/1 amplifier has a connection for an optional remote level controller (HD-RLC or MHD-RLC). This allows remote control of the output level. Multiple amplifiers can be controlled by a single HD-RLC using a non-duplex telephone line splitter and multiple telephone cables.

Route all system cables carefully away from moving parts and sharp edges. Secure them with cable ties or clamps and use grommets and sleeves where necessary to protect them from sharp edges.

The amplifier accepts an input voltage from 200mV to 4V via its RCA inputs (CH. 1 Input and CH. 2 Input). If only a single subwoofer channel signal is available, a Y-adapter is recommended to power both inputs.

The RCA pre-outs (Preout 1 and Preout 2) provide the same signal as that connected to inputs CH. 1 and CH. 2. They function as a signal pass-through and are not affected by the amplifier's low-pass filter, allowing the signal to be sent to another amplifier.

The input filter configures the application of the input filter. Select "Car" for most installations (automotive or marine). Select "Boat" if you experience interference from high-current mechanical switches/devices, which may be more common in a marine environment.

The input sensitivity setting is used to match the output voltage of your audio source (car radio, main unit) with the amplifier inputs, to optimize the signal level and avoid distortion.

For subwoofer outputs (Mono Subwoofer Output), a 16 to 8 AWG cable is recommended to connect your subwoofer to the amplifier.

Yes, before any installation, it is recommended to power off the audio system and disconnect the battery system from the audio system for safety reasons.

Yes, the amplifier is compatible with original equipment manufacturer (OEM) audio systems thanks to its automatic power-on modes "DC Offset-Sensing" and "Signal-Sensing". These modes allow the amplifier to turn on by detecting audio signals from the high-level outputs of your OEM main unit.

The JL Audio XDM300/1 amplifier has a net weight of approximately 2.05 kg.

Before cutting or drilling, always check for potential obstacles behind mounting surfaces to avoid damaging existing components or cables.

Yes, the user manual for the JL Audio XDM300/1 amplifier is available in several languages, including French (Manuel d'utilisation), English (Owner's Manual), Spanish (Manual del Propietario), German (Bedienungsanleitung), and Italian (Manuale del Proprietario).