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owner's manual
Not FoR use iN 12 V systeMs!
4-Channel Class-D Full-Range Marine 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 MHD600/4-24V
Summary of Contents for JL Audio MHD600/4-24V
- 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
Remote Turn-On Rear Left & Right Remote Level Connector Connector Channel Input Jacks Control Knob (pgs. 6-7) (pgs. 6-7) (pg. 9) (pg. 13) Ground Remote Front Inputs Rear Preouts Remote Level Control 2 | JL Audio - MHD600/4-24V Owner’s Manual... -
Page 3: 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. For optimum cooling performance, which does not interfere with your vessel’s factory... -
Page 4: Product Description
2 or 300W x 1) and the other channel pair driving main speakers in high-pass mode (150W x 2). 4) As a very powerful (300W x 2) full-range amplifier, delivering full-range signals to a stereo speaker system. 4 | JL Audio - MHD600/4-24V Owner’s Manual... -
Page 5: Typical Installation Sequence
13) Turn on the source unit at a low level MHD600/4-24V and powered from the same main power wire. to double-check that the amplifier is 3) Connect power wire to the positive battery configured correctly. -
Page 6: Ground Connection
Please note that lower AWG numbers mean AWG when installing amplifier systems with main bigger wire and vice-versa (1/0 AWG is the largest, fuse ratings above 60A. 2 AWG is smaller, then 4 AWG, then 8 AWG, etc.). 6 | JL Audio - MHD600/4-24V Owner’s Manual... - Page 7 “Remote” connection. Strip 3/8 inch (10 turn-on wire mm) of insulation from the end of each wire and The MHD600/4-24V uses a conventional +12V insert the bare wire into the receptacle on power or +24V remote turn-on wire, typically controlled connector plug, seating it firmly so that no bare by the source unit’s remote turn-on output.
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Page 8: Standard Mounting
Lateral Mounting Feet. Check before drilling any holes in your vessel to make sure that you will not be drilling through a gas tank, brake line, wiring harness or other vital vessel system. 8 | JL Audio - MHD600/4-24V Owner’s Manual... - Page 9 “Input Voltage” range switch and a rotary control labeled “Input Sens.” (Input Sensitivity). These controls are designed to match the input sensitivity of the MHD600/4-24V to the specific signal source that is feeding it and must be adjusted, with care, following the procedures outlined in this manual.
- Page 10 RCA plugs for each input pair input cables are feeding the amplifier. These or use the JL Audio ECS Speaker Wire to RCA controls will allow you to set the appropriate relative levels for the “Front” channels relative adaptor (XB-CLRAIC2-SW).
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Page 11: Crossover Controls
Proper crossover setup is critical to sound quality and reliability. frequencies above or below the selected The MHD600/4-24V has two individual filter frequency at a rate of 12 dB per octave filters, one for the “Front” channels and the (Butterworth alignment). - Page 12 For precise filter frequency frequency information for the MHD600/4-24V information refer to Appendix B (page 18). refer to Appendix B (pages 18). Refer to the subwoofer amplifier owner’s manual for its proper adjustment levels. 12 | JL Audio - MHD600/4-24V Owner’s Manual...
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Page 13: Preamp Outputs
Preamp Output signals are not affected by any crossover filter or input sensitivity setting Panel of the amplifier using a standard telephone selected on the MHD600/4-24V (if the input cable (supplied with the HD-RLC). signal is full-range, the Preamp Output will be If desired, multiple MHD amplifiers can be full-range). -
Page 14: Speaker Outputs
“safe” mode which reduces amplifier power to protect the circuitry from failure (the LED status indicator on the control panel will light up amber to indicate that this has happened). See page 16 for details. 14 | JL Audio - MHD600/4-24V Owner’s Manual... -
Page 15: Bridging Considerations
The MHD600/4-24V has been designed for bridging of its channel pairs without the need for input inversion adaptors. - Page 16 LED will light when you connect the section For more information on troubleshooting this that is experiencing the problem and turn the amplifier, refer to Appendix D (pages 20, 21) volume up. 16 | JL Audio - MHD600/4-24V Owner’s Manual...
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Page 17: Preamp Output
JL Audio dealer so Amplifier Topology: Class D, switching type with that it may be sent in to JL Audio for service. patented Single-Cycle Control™ technology. There are no user serviceable parts or fuses inside Power Supply: Pulse width modulation-regulated the amplifier. - Page 18 Sens.” for the affected channels if any equalizer boost is activated after setting the “Input Sens.” with this procedure. This applies to any EQ boost circuit, source unit tone controls or EQ circuits. EQ cuts will not require re-adjustment. 18 | JL Audio - MHD600/4-24V Owner’s Manual...
- Page 19 If bridged, level control to 3/4 of maximum (if used make sure you test the voltage at the correct to drive the MHD600/4-24V). Disconnect connectors (L+ and R–). the HD-RLC Remote Level Control 8) Increase the “Input Sens.” control until temporarily (if one is being used).
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Page 20: Appendix D: Troubleshooting
Check the input connectors to ensure that they all are making good contact with the input jacks on the amplifier. 20 | JL Audio - MHD600/4-24V Owner’s Manual... - Page 21 “my amplifier shuts off once in a while, usually at higher volumes” Check your voltage source and grounding point. The power supply of the MDH600/4-24V will operate with charging system voltages down to 18V. Shutdown problems at higher volume levels can occur when the charging system voltage drops below 18V.
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Page 22: Installation Notes
22 | JL Audio - MHD600/4-24V Owner’s Manual... - Page 24 - marine Products (usa) JL AUDIO warrants this product to be free of defects in materials and workmanship for a period of two (2) years from the original date of purchase. This warranty is not transferable and applies only to the original purchaser from an authorized JL AUDIO dealer.
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