XDM4004 - Receiver JL Audio - Free user manual and instructions

Product Type	4-Channel Amplifier
Brand	JL Audio
Model	XDM4004
Dimensions (L × D × H)	217 × 180 × 52 mm
Power Supply	12 VDC (negative ground)
Recommended Fuse	40 A
Output Power (14.4 V, <1% THD)	75 W × 4 (4 Ω), 100 W × 4 (2 Ω), 150 W × 2 (8 Ω bridged), 200 W × 2 (4 Ω bridged)
Output Power (12.5 V, <1% THD)	60 W × 4 (4 Ω), 90 W × 4 (2 Ω), 120 W × 2 (8 Ω bridged), 180 W × 2 (4 Ω bridged)
Topology	Class D NexD™
Frequency Response	12 Hz – 22 kHz (+0, -1 dB)
Signal-to-Noise Ratio (A-weighted)	>104 dB (re: rated power)
Input Voltage Range	200 mV – 4 V RMS
Built-in Filters	High-pass or low-pass, 12 dB/octave, 50–500 Hz, defeatable per channel pair
Turn-On Modes	Remote (+12 V), DC offset detection, audio signal detection
Input Modes	2-channel (stereo) or 4-channel
Remote Level Control	Optional (HD-RLC or MHD-RLC), full attenuation
Protections	Status LED: green (normal), red (thermal), orange (overcurrent), off (undervoltage)
Recommended Cable Gauge	Power/ground: 4 AWG (min. 8 AWG); speaker: 16–8 AWG
Water Resistance	Yes, splash resistant (do not immerse)
Recommended Use	12 V negative ground systems (automotive, marine)

Frequently Asked Questions - XDM4004 JL Audio

What is the output power of the JL Audio XDM4004?

Output power depends on impedance and voltage. At 14.4 V with less than 1% distortion: 75 W × 4 at 4 Ω, 100 W × 4 at 2 Ω, 150 W × 2 at 8 Ω bridged, 200 W × 2 at 4 Ω bridged. At 12.5 V: 60 W × 4 at 4 Ω, 90 W × 4 at 2 Ω, 120 W × 2 at 8 Ω bridged, 180 W × 2 at 4 Ω bridged.

How to adjust the input sensitivity (Input Sens.)?

Follow the procedure in Appendix A: disconnect speakers, disable all audio processing, set source volume to 3/4, then use an AC voltmeter and a sine wave to adjust sensitivity to the target voltage corresponding to the impedance (e.g., 17.3 V for 4 Ω stereo). Never exceed the maximum level to avoid distortion and damage.

What types of filters are available on each channel pair?

Each channel pair (1/2 and 3/4) has an active 12 dB/octave filter adjustable from 50 to 500 Hz. You can select modes Off (full range), HP (high-pass), or LP (low-pass) via the Filter Mode button.

How to turn on the amplifier without a remote wire?

The turn-on mode can be set to Offset (detection of a small DC signal on high-level inputs) or Signal (detection of an audio signal). In Offset mode, the Remote terminal becomes a +12 V output. Use these modes for OEM installations.

What does the red or orange status LED mean?

The red LED indicates a thermal condition: audio output is reduced until temperature returns to normal. The orange LED indicates overcurrent (short circuit or low impedance): audio output is muted, a ticking noise may be audible. Check speaker connections.

What power cable gauge is recommended?

Use a copper power and ground cable of 4 AWG (minimum 8 AWG). The 40 A fuse must be installed within 45 cm (18 in) of the battery positive terminal. For ABYC/NMEA applications, protection must be within 18 cm (7 in) of the battery.

Can I use the amplifier in a marine environment?

Yes, the XDM4004 is splash resistant, but must not be immersed or subjected to high-pressure spray. For marine installation, set the input filter to Boat to reduce electromagnetic interference.

How to connect a remote level controller (HD-RLC)?

Connect the optional controller to the Remote Level Control jack (terminal 3). The knob allows full attenuation by turning counterclockwise. The control mode (All or 3/4 only) is set via the Remote Level Mode switch.

What is the minimum speaker impedance in bridged mode?

In bridged mode (e.g., channels 1+2), the minimum impedance is 4 Ω. For stereo operation, the minimum impedance is 2 Ω per channel. Do not go below to avoid overloading.

How to configure the input mode to use only inputs 1 and 2?

Set the Input Mode switch to 2 Ch. (2 channels). In this position, channels 3 and 4 will use the signals from channels 1 and 2 respectively (identical reproduction). This allows driving 4 channels with only 2 inputs.

USER MANUAL XDM4004 JL Audio

Front view of a black industrial fan or speaker unit with ventilation grilles and a logo (no visible text or symbols)

XDM400/4

400W 4-CHANNEL AMPLIFIER

OWNER'S MANUAL MANUEL D'UTILISATION MANUAL DEL PROPIETARIO BEDIENUNGSANLEITUNG MANUALE DEL PROPRIETARIO

Technical line drawing of a device chassis with ports and mounting holes (no text or symbols)

INSTALLATION CONSIDERATIONS

• Installation requires appropriate tools and safety equipment. Professional installation is recommended.
  • This product is water-resistant. Do not submerge or subject to high-pressure water spray.
• Before installation, turn off the audio system and disconnect the battery system from the audio system.
• When possible, install in a dry, well-ventilated location that does not interfere with factory-installed systems. If a dry environment is not available, a location that is not exposed to heavy splashing may be used.
• Do not install in the engine compartment, any areas of extreme heat or where it will be directly exposed to the elements.
• Before cutting or drilling, check for potential obstacles behind mounting surfaces.
• Carefully route all system wiring away moving parts and sharp edges; secure with cable ties or wire clamps and use grommets and loom where appropriate to protect from sharp edges.

SAFETY CONSIDERATIONS

• Only use this product with 12 volt, negative-ground electrical systems. This product is not certified or approved for use in aircraft.
• Mount this product securely to prevent damage or injury in severe conditions.
• An appropriate fuse (or circuit breaker) at the main power wire is vital for vehicle/vessel safety and must be installed within 18 inches (45 cm) of the positive battery connection.
• For ABYC and NMEA applications, circuit protection is required within 7 inches (18 cm) of the battery, unless the cable is in an enclosure or conduit.
• Listen to your audio system at levels appropriate for operating conditions and hearing safety.

CONNECTIONS

	Connection Description Notes
1	+12 VDC Positive (+12V) Power Connection				• 4 AWG wire (8 AWG minimum)• Install 40A fuse at (+) battery post
	Ground Negative (GND) Ground Connection • 4 AWG wire (required)
	Remote Positive (+12V) Activation Connection				• 18 - 12 AWG wire capacity• See turn On Mode for more info
2	CH. 1 Input Left Input Signal, Black RCA				• Accepts 200mV - 4V input voltage• See output Mode for more info
	CH. 2 Input Right Input Signal, Red RCA
	CH. 3 Input Left Input Signal, Black RCA
	CH. 4 Input Right Input Signal, Red RCA
	Preout 1 Left Pass-Through Preamp Signal, Black RCA				• See outputs From for more info
	Preout 2 Right Pass-Through Preamp Signal, Red RCA
3	Remote Level Control	Remote Level Controller Connection (optional)(HD: RLC or MHD: RLC)			• Operates as an attenuator only:Fully counter clockwise = Level MutedFully clockwise = Level Unaffected
4	CH. 1 (L) Speaker Output	⊕	(+) Positive Speaker Output CH. 1&2 Bridged (+)		• Minimum impedance load:Stereo mode >2 ohmsBridged mode ≥4 ohms• 16 - 8 AWG wire capacity
		⊖	(-) Negative Speaker Output
	CH. 2 (R) Speaker Output	⊕	(+) Positive Speaker Output
		⊖	(-) Negative Speaker Output CH. 1&2 Bridged (-)
	CH. 3 (L) Speaker Output	⊕	(+) Positive Speaker Output CH. 3&4 Bridged (+)
		⊖	(-) Negative Speaker Output
	CH. 4 (R) Speaker Output	⊕	(+) Positive Speaker Output
		⊖	(-) Negative Speaker Output CH. 3&4 Bridged (-)

CONTROLS

	Control (Function) Setting Description
5	Status LED(indicatesoperating status)	Flashing Green	Amplifier Powering Up, Audio Output Muted
		Green On	Normal Operation, Active Audio Output
		Rad	On-Safe Mode, Over-Temperature Condition, Audio Output ReducedReverts to normal operation when temperature returns to a safe level
		Amber(yelovi)	On Safe Mode, Over Current Condition, Audio Output MutedMay exhibit repetitive, audible ticking or thumping noise in the outputInspect for speaker/wire short circuit or low impedance
		LEDs Off	Amplifier Turns Off (unexpectedly), Low-Voltage ConditionOccurs when battery or remote turn-on voltage drops below 10VReverts to normal operation when voltage rises above 11V
6	Turn On Mode(configuresactivation method)	Remote	+12V Remote Turn-On (Preferred)Controlled by a switched +12V circuit or turn-on output of your source unit/OEM interface
		Offset	DC Offset Sensing (Automatic)Turns On by detecting the presence of small DC signal in OEM audio outputs and turns Off after the signal is removed	Designed for high-level (speaker) signals onlyDetects input signal from CH. 1 (LI only)Using DC Offset or Signal Sensing methods will turn the "Remote" terminal into a +12V turn-on output.
		Signal	Signal Sensing (Automatic)Turns On by detecting full-range OEM audio signals and turns OFF after the signal is removed(within 30 seconds)
	Input Filter(configuresinput filter application)	Car Select for most installations (automotive or marine)
		Boot Select if experiencing interference from high current mechanical switches/devices
	Input Mode(configuresinput signal connections)	2 Ch.	Select when using CH. 1&2 inputs onlyCH. 3 will operate with CH. 1 signalCH. 4 will operate with CH. 2 signal
		4 Ch. Select when using all four inputs
	Remote Level Mode(configuresHD-RLC operation - optional)	All Adjusts level of all channels equally		Multiple amplifiers can be controlled from a single HD-PLC using a non-duplex phone line splitter and multiple phone codes.
		3 - 4 Adjusts level of channels 3 & 4 only
	Preouts From(configures preamp output signals)	1&2 Same signal that is connected to CH. 1&2 Inputs
		Sum Summed signal, combining CH. 1&3 and CH. 2&4 Inputs into a stereo signal pair

CONTROLS

	Control (Function) Setting Description
7	Input Sens. (adjusts each channel pair's input stage)	Variable	Use to match the source unit's output voltage with the inputs of each pair of amplifier channels. See Appendix A for detailed information.
	Filter Mode configuaresthe filter of CH. 1&2	Off Filter defeated; passes full range of frequencies present at the inputs
		HP	Attenuates frequencies below the CH. 1&2 "Filter Freq. (Hz)" dial, at a rate of 12dB/octave
		LP	Attenuates frequencies above the CH. 1&2 "Filter Freq. (Hz)" dial, at a rate of 12dB/octave
	Filter Freq. (Hz) (adjusts filter cutoff frequency)	Variable	Use to adjust the cutoff frequency of channel 1&2's active filter, from 50 Hz - 500 Hz / 12dB per octave
	Filter Mode configuaresthe filter of CH. 3&4	Off Filter defeated; passes full range of frequencies present at the inputs
		HP	Attenuates frequencies below the CH. 3&4 "Filter Freq. (Hz)" dial, at a rate of 12dB/octave
		LP	Attenuates frequencies above the CH. 3&4 "Filter Freq. (Hz)" dial, at a rate of 12dB/octave
	Filter Freq. (Hz) (adjusts filter cutoff frequency)	Variable	Use to adjust the cutoff frequency of channel 3&4's active filter, from 50 Hz - 500 Hz / 12dB per octave

APPENDIX A:

Input Sensitivity Level Setting

Follow the steps below to adjust the input sensitivity of each amplifier

channel pair to achieve overall system balance.

Necessary Equipment

• Digital AC Voltmeter

• Sine-wave test tone recorded at 0 dBs reference level in the frequency range to be amplified.Do not use attenuated test tones (-10 dB, -20 dB, etc.).Full range channel/amplifier applications: 1 kHzSubwoofer channel/amplifier applications: 50 Hz

• Depending on your type of source unit, the sine-wave may be played via a CD, USB thumb drive, portable media player or Bluetooth® audio source. Make sure to disable any FQ/DSP modes on your portable media player during level setting.

The Nine-Step Procedure

1. Disconnect the speaker(s) from the amplifier's speaker output connectors.

2. Turn off all processing (bass/treble, loudness, EQ, etc.) on the source unit, processors (if used), and amplifier. Set the factor control to center position and the subwoofer level control to 3/4 of maximum, if used.

3. Turn all "Input Sens." controls all the way down.

4. Set the source unit volume to 3/4 of full volume. This will allow for reasonable gain overlap with moderate clipping at full volume.

5. Using the chart below, determine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to the amplifier outputs.

6. Verify that you have disconnected the speakers before proceeding. Play a track with an appropriate sine wave (within the frequency range to be amplified) at 3/4 source unit volume.

7. Connect the AC voltmeter to the speaker output terminals of the amplifier. If the channel pair is operating in stereo, it is only necessary to measure one channel. If bridged, make sure you test the voltage at the correct terminals (L+ and R-).

8. Increase the "Input Sens." control until the target voltage is observed with the voltmeter.

9. Once you have adjusted each channel section to its maximum low-distortion output level, reconnect the speaker(s). The "Input Sens." controls can now be adjusted downward if the amplifier requires attenuation to achieve the desired system balance.

IMPORTANT!

• Do not increase any "Input Sens." setting for any amplifier channel or channel pair in the system beyond the maximum level established during this procedure. Doing so will result in audible distortion and possible speaker damage.

• It will be necessary to re-adjust the "Input Sens." if any equalizer boost is activated after setting the "Input Sens." with this procedure. This applies to any EQ boost circuit, including source unit tone controls or EQ circuits. EQ cuts will not require re-adjustment.

Nominal Impedance	Target AC Voltage
	Stereo	Bridged
8Ω	17.2 V	34.6 V
4Ω	17.3 V	28.2 V
2Ω	14.1 V	not recommended

SPECIFICATIONS

Amplifier Section
Amplifier Topology	NexDTM Ultra-High Speed Class D
Power Supply Type	Unregulated MOSFET Switching
Minimum Copper Power/GND Wire	8 AWG(Note: CCA/Copper Clad Aluminum wire is not recommended.)
Recommended Fuse	40 A
Rated RMS Power @ 14.4V, <1% THD+N	75W x 4 @ 4 Ω 100W x 4 @ 2 Ω
	150W x 2 @ 8 Ω Bridged 200W x 2 @ 4 Ω Bridged
Rated RMS Power @ 12.5V, <1% THD+N	60W x 4 @ 4 Ω 90W x 4 @ 2 Ω
	120W x 2 @ 8 Ω Bridged 180W x 2 @ 4 Ω Bridged
Frequency Response	2 Hz - 22 kHz (+0, -1dB)
S/N Ratio(A-weighted, 20 Hz -20 kHz noise bandwidth)	>104 dB (Referred to rated power),>84 dB (Referred to 1W)
Damping Factor	>150 / 50 Hz @ 4 Ω, >75 / 50 Hz @ 2 Ω
Input Section
Number of Inputs 4	(Two Stereo Pairs)
Input Type	Differential-Balanced with RCA jack inputs
Input Voltage Range	200mV - 4V RMS
Signal Processing
Filter Type	CH. 1&2 CH. 3&4
	Active, 12dB/octave, High Pass or Low Pass(50 - 500 Hz), defeatable
Remote Level Control	HD-RLC or MHD-RLC (optional). Full mute to 0 dB range.
Dimensions
L x W x H	8.52 in. x 7.09 in. x 2.05 in. (217 mm x 180 mm x 52 mm)

CONSIDÉRATIONS RELATIVES À L'INSTALLATION