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owner's manual
400W Marine 2/3/4 Channel Amplifier
Thank you for purchasing a JL Audio amplifier for
your marine sound system.
Your amplifier has been designed and manufactured to exacting
standards in order to ensure years of musical enjoyment in your vessel.
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 so as 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 M400/4
Summary of Contents for JL Audio M400/4
- 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: Installation Applications
The outer shell of your JL Audio amplifier is the event of a collision or a sudden jolt to the vessel. such high sound pressure levels when connected Do not attempt to “bridge”... -
Page 3: Product Description
M600/4 is the the vessel and your body during installation. be protected with a high quality rubber The M400/4 can be operated with a wide only device being run from the fused main grommet to prevent damage to the variety of source units and system configurations. -
Page 4: Turn-On Lead
If you wish to send four discrete channels into you can then adjust any or all “Input Sens.” the M400/4, simply use all four inputs and set the levels downward if this is required to achieve the “Input Mode” switch in the “4 Ch.” position. -
Page 5: Filter Controls
2) “Sum”: When the M400/4 is being used to drive subwoofer performance. one or more of the M400/4’s channel pairs in a (supplied with the HD-RLC). -
Page 6: Speaker Outputs
JL Audio dealer so functioning normally, audio output is active. that it may be sent in to JL Audio for service. When a pair of the M400/4’s channels are There are no user serviceable parts or fuses inside... -
Page 7: Multi-Amplifier Systems
For precise filter frequency right and dedicated subwoofer outputs. Inp ut Connections: The main stereo pair a system with a single M400/4 are explained in The second stereo pair of source unit outputs information refer to Appendix B (page 15). - Page 8 C: input sensitivity level setting 9) Once you have adjusted the M400/4 to its Precise Frequency selection Chart m400/4 specifications Following the directions below will allow the maximum low-distortion output level, “Filter Freq” installer to adjust the input sensitivity of each reconnect the speaker(s).
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Page 9: Appendix D: Troubleshooting
Please refer to Appendix A (page 14) to set the input sensitivity for Check your voltage source and grounding point. The power supply maximum, low-distortion output. of the M400/4 will operate with charging system voltages “my amplifier doesn’t turn on.” down to 10V. Shutdown problems at higher volume levels Check the fuse, not just visually, but with a continuity meter. - Page 10 Use this diagram to document your amplifier’s switch and control positions. 18 | JL Audio - M400/4 Owner’s Manual...
- Page 11 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.