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

    Left & Right Preamp Remote Level Connector Connector Output Jacks Control Knob (pgs. 6-7) (pgs. 6-7) (pg. 12) (pg. 13) +12 VDC Ground +12 VDC Ground Remote Remote Inputs Preouts Remote Level Control 2 | JL Audio - HD750/1 Owner’s Manual...

  • Page 3: Product Description

    Unlike most monoblock amplifiers, the 1) Disconnect the negative battery post 9) Connect the RCA input cables HD750/1 is a full-range design, so it can be connection and secure the disconnected cable to the amplifier. used as a subwoofer amplifier or as a very...
  • Page 4 Control The installation of a fuse on the main power use of a JL Audio ECS master ground lug the wire and fold the bare wire in half prior to wire, within 18 wire inches (45 cm) of the positive (XB-MGLU).

  • Page 5: Input Controls

    Check before drilling any holes in your vehicle onto a pair of RCA plugs for each input pair to make sure that you will not be drilling or use the JL Audio ECS Speaker Wire to RCA through a gas tank, brake line, wiring harness adaptor (XB-CLRAIC2-SW).

  • Page 6: Crossover Controls

    The HD750/1 has one filter, which can be filter frequency at a rate of 12 dB per octave configured as a high-pass filter (attenuates low (Butterworth alignment).
  • Page 7 HD750/1 from the front of the vehicle. This design. This sophisticated power supply allows of the subwoofer system in order to produce signal(s) feeding the HD750/1.
  • Page 8 This LED’s behavior that may require service of the amplifier, its that it may be sent in to JL Audio for service. is as follows: wiring or the vehicle’s charging system. Audio There are no user serviceable parts or fuses inside speaker Connector Plugs is muted when this fault occurs.

  • Page 9: Appendix A: Hd750/1 Specifications

    10.74 in. x 7.85 in. x 1.93 in. (273 mm x 199.5 mm x 49 mm) Dimensions do not include connectors. Due to ongoing product development, all specifications are subject to change without notice. 16 | JL Audio - HD750/1 Owner’s Manual...
  • Page 10 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 - HD750/1 Owner’s Manual...
  • Page 11 Please refer to Appendix C (pages 18, 19) to set the input sensitivity Check your voltage source and grounding point. The power supply for maximum, low-distortion output. of the HD750/1 will operate with charging system voltages “my amplifier doesn’t turn on” down to 8.5V. Shutdown problems at higher volume levels Check the fuse(s), not just visually, but with a continuity meter.
  • Page 12 22 | JL Audio - HD750/1 Owner’s Manual...
  • 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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