JL Audio HD750/1 Owner's Manual
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JL Audio HD750/1 Owner's Manual

Monoblock full-range amplifier
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owner's manual
Monoblock Full-Range 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 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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Summary of Contents for JL Audio HD750/1

  • 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.

  • Page 2: Protect Your Hearing

    Remote Turn-On Connector (pgs. 6-7) +12 VDC Ground +12 VDC Ground 2 | JL Audio - HD750/1 Owner’s Manual Cooling efficiency Considerations: Your JL Audio amplifier employs an advanced type of heat management, called RealSink™. This feature takes advantage of convection and radiation effects to remove heat from the amplifier circuitry.

  • Page 3: Product Description

    Unlike most monoblock amplifiers, the HD750/1 is a full-range design, so it can be used as a subwoofer amplifier or as a very powerful full-range or satellite amplifier, using a second 750/1 to form a stereo pair.
  • Page 4 If only the appropriate power ring or specialized battery HD750/1 is being run from that power wire, we terminal connector, such as the JL Audio recommend a 60A fuse be used. AGU (big glass XB-BTU.

  • Page 5: Input Controls

    OEM (factory-installed) systems. To use speaker-level sources, splice the speaker output wires of the source unit or small amplifier onto a pair of RCA plugs for each input pair or use the JL Audio ECS Speaker Wire to RCA adaptor (XB-CLRAIC2-SW).

  • Page 6: Crossover Controls

    Appendix C (pages 18, 19). Doing so will result in audible distortion and possible speaker damage. 10 | JL Audio - HD750/1 Owner’s Manual Crossovers are groups of electronic filters The HD750/1 has one filter, which can be...
  • Page 7 The HD750/1 employs JL Audio’s exclusive Control (HD-RLC), you can control the volume Regulated, Intelligent Power Supply (R.I.P.S.) of the HD750/1 from the front of the vehicle. This design. This sophisticated power supply allows is particularly useful for subwoofer level control.
  • Page 8 JL Audio dealer so that may require service of the amplifier, its that it may be sent in to JL Audio for service. wiring or the vehicle’s charging system. Audio There are no user serviceable parts or fuses inside is muted when this fault occurs.

  • Page 9: Appendix A: Hd750/1 Specifications

    16 | JL Audio - HD750/1 Owner’s Manual aPPendix a: Hd750/1 specifications Amplifier Topology: Class D, switching type with patented Single-Cycle Control™ technology. Power Supply: Pulse width modulation-regulated switching power supply Recommended Fuse Value / Type: 60A (AFS, AGU or MaxiFuse™)
  • Page 10 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 - HD750/1 Owner’s Manual the nine-step Procedure 1) Disconnect the Speaker Connector Plug.
  • Page 11 “my amplifier shuts off once in a while, usually at higher volumes” Check your voltage source and grounding point. The power supply of the HD750/1 will operate with charging system voltages down to 8.5V. Shutdown problems at higher volume levels can occur when the charging system voltage drops below 8.5V.
  • Page 12 O | HP | LP Mode Status 22 | JL Audio - HD750/1 Owner’s Manual 12dB | 24dB Low | High Filter Filter Input Slope Filter Freq. (Hz) Sens.
  • Page 13 - amPliFiers (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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