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OWNER'S MANUAL
400W 2/3/4 Channel Amplifier
Thank you for purchasing a JL Audio amplifier for
your automotive sound system.
Your amplifier has been designed and manufactured to exacting
standards in order to ensure years of musical enjoyment in your vehicle.
For maximum performance, we highly recommend that you have
your new amplifier installed by an authorized JL Audio dealer. Your
authorized dealer has the training, expertise and installation equipment
to ensure optimum performance from this product. Should you
decide to install the amplifier yourself, please take the time
to read this manual thoroughly to familiarize yourself
with its installation requirements and setup procedures.
If you have any questions regarding the instructions in this
manual or any aspect of your amplifier's operation, please contact your
authorized JL Audio dealer for assistance. If you need further assistance,
please call the JL Audio Technical Support Department
at (954) 443–1100 during business hours.
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Table of Contents
Related Manuals for JL Audio XD 400/4v2
Summary of Contents for JL Audio XD 400/4v2
- Page 1 For maximum performance, we highly recommend that you have your new amplifier installed by an authorized JL Audio dealer. Your authorized dealer has the training, expertise and installation equipment to ensure optimum performance from this product.
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Page 2: Protect Your Hearing
Mode Selection Switch (pg. 7) (pg. 7) (pg. 6) (pg. 9) Preouts From Remote Level Mode 4 Channel Amplifier Turn-On Mode Input Voltage Rem. | O set | Signal Low | High 2 | JL Audio - XD400/4v2 Owner’s Manual... -
Page 3: Planning Your Installation
Cooling Efficiency Considerations: Safety Considerations: The outer shell of your JL Audio amplifier Your amplifier needs to be installed in a dry, is designed to remove heat from the amplifier well-ventilated environment and in a manner circuitry. -
Page 4: Product Description
NexD™ ultra-high speed switching technology to negative power wire to it using appropriate deliver outstanding fidelity and efficiency. hardware (use of the JL Audio ECS master The XD400/4v2 can be operated with a wide ground lug, XB-MGLU is recommended). variety of source units and system configurations. -
Page 5: Power Connections
For optimal grounding, we recommend the use of a JL Audio ECS master ground lug (XB-MGLU). Alternatively, a sheet metal screw or bolt can be used with a star washer. -
Page 6: Turn-On Options
Input connections are via up to two pairs of the source unit, which can be very useful when traditional RCA-type jacks. interfacing the amplifier with OEM (factory) 6 | JL Audio - XD400/4v2 Owner’s Manual... -
Page 7: Input Sensitivity Controls
To use speaker level sources, splice the speaker output wires of the source unit or small amplifier onto a pair of RCA cables or plugs, or use the JL Audio ECS Speaker Wire to RCA adaptor (XD-CLRAIC2-SW). Preouts From... -
Page 8: Filter Controls
Remote Level Mode (Hz)” setting. After properly adjusting the “Input Sens.”, as outlined in Appendix A (page 14), you can fine tune the “Filter Freq. (Hz)” control to achieve the desired system frequency response. 8 | JL Audio - XD400/4v2 Owner’s Manual... -
Page 9: Remote Level Control (Optional)
REMOTE LEVEL CONTROL (OPTIONAL) PREOUTS The XD400/4v2 incorporates a buffered, pass- through preamp output section, so that additional amplifiers can be easily added to the system. This pass-through preamp output can be configured two different ways using the switch labeled “Preouts From”. -
Page 10: Bridging Considerations
RCA inputs of the bridged channel channel (or 4 ohms bridged) are not pair. This option is used when deploying a recommended and may cause the amplifier to initiate a protection mode which reduces power output. 10 | JL Audio - XD400/4v2 Owner’s Manual... - Page 11 JL Audio dealer so audio output is muted. that it may be sent in to JL Audio for service. There are no user serviceable parts or fuses inside 2) Constant Green: The amplifier is on and the amplifier.
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Page 12: System Configurations
2 Controls” and select “HP” (high-pass) on the not be user adjustable from the front of the “Filter Mode” switch and an appropriate “Filter vehicle. Freq.” (again, 80 Hz is a good starting point). 12 | JL Audio - XD400/4v2 Owner’s Manual... -
Page 13: Multi-Amplifier Systems
HF channels, but (All JL Audio amplifiers have this feature.) cannot fade the front and rear HF channels In this configuration, channels 1&2 of the relative to each other. -
Page 14: Necessary Equipment
XD400/4v2) at 3/4 source unit volume. 7) Connect the AC voltmeter to the speaker output connectors of the amplifier. Make sure you test the voltage at the correct connectors (+ and –). 14 | JL Audio - XD400/4v2 Owner’s Manual... -
Page 15: General Specifications
APPENDIX B: APPENDIX C: Precise Frequency Selection Chart XD400/4v2 Specifications “FILTER FREQ” General Specifications: Detent Panel Actual Recommended Fuse Value: 40A Number Marking Freq. Recommended Fuse Type: MAXI® or AGU Full counter-clockwise: 49 01 ......49 02 . -
Page 16: Appendix D: Troubleshooting
Check the input connectors to ensure that they all are making good contact with the input jacks on the amplifier. 16 | JL Audio - XD400/4v2 Owner’s Manual... - Page 17 “My amplifier shuts off once in a while, usually at higher volumes.” Check your voltage source and grounding point. The power supply of the XD400/4v2 will operate with charging system voltages down to 10V. Shutdown problems at higher volume levels can occur when the charging system voltage (or remote turn-on voltage) drops below 10V.
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Page 18: Installation Notes
INSTALLATION NOTES: Use this diagram to document your amplifier’s switch and control positions. 4 Channel Amplifier Turn-On Mode Input Voltage Rem. | O set | Signal Low | High 18 | JL Audio - XD400/4v2 Owner’s Manual... - Page 20 All warranty returns should be sent to JL AUDIO ’s Amplifier Service Facility freight-prepaid through an authorized JL AUDIO dealer and must be accompanied by proof of purchase (a copy of the original sales receipt). Direct returns from consumers or non-authorized dealers will be refused unless specifically authorized by JL AUDIO with a valid return authorization number.
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