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Protect Your Hearing!
We value you as a
While driving, operate your audio system in a manner that still allows you to hear necessary noises to operate your vehicle safely (horns, sirens, etc.).
Serial Number
In the event that your amplifier requires service or is ever stolen, you will need to have a record of the product’s serial number. Please take the time to enter that number in the space provided below. The serial number can be found on the bottom panel of the amplifier and on the amplifier packaging.
Serial Number:
Installation Applications | Cooling Efficiency Considerations: | Safety Considerations: |
This amplifier is designed for operation in | Your JL Audio amplifier employs an | Your amplifier needs to be installed in a dry, |
vehicles with 12V, | advanced type of heat management, called | |
systems. Use of this product in vehicles with | RealSink™. This feature takes advantage of | which does not interfere with your vehicle’s safety |
positive ground and/or voltages other than 12V | convection and radiation effects to remove | equipment (air bags, seat belt systems, ABS brake |
may result in damage to the product and will void | heat from the amplifier circuitry. For optimum | systems, etc.). You should also take the time to |
the warranty. | cooling performance, the vertical heat sinks | securely mount the amplifier using appropriate |
This product is not certified or approved for | located at the sides of the amplifier should be | hardware so that it does not come loose in the |
use in aircraft. | exposed to as large a volume of air as possible. | event of a collision or a sudden jolt to the vehicle. |
Do not attempt to “bridge” the outputs of this | Enclosing the amplifier in a small, poorly |
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amplifier with the outputs of a second amplifier, | ventilated chamber can lead to excessive heat | Stupid Mistakes to Avoid: |
including an identical one. | • Check before drilling any holes in your vehicle | |
| installation calls for an enclosure around the | to make sure that you will not be drilling |
Planning Your Installation | amplifier, we recommend that this enclosure | through a gas tank, brake line, wiring harness or |
It is important that you take the time to read | be ventilated with the aid of a fan. In normal | other vital vehicle system. |
this manual and that you plan out your | applications, | • Do not run system wiring outside or underneath |
installation carefully. The following are some | If mounting the amplifier under a seat, | the vehicle. This is an extremely dangerous |
considerations that you must take into account | make sure there is at least 1 inch (2.5 cm) of | practice which can result in severe damage to |
when planning your installation. | space above the amplifier’s outer shell to permit | your vehicle and person. |
| proper cooling. | • Protect all system wires from sharp metal |
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| edges and wear by carefully routing them, |
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| tying them down and using grommets and |
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| loom where appropriate. |
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| • Do not mount the amplifier in the engine |
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| compartment, under the vehicle, on the roof |
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| or in any other area that will expose the |
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| amplifier circuitry to the elements. |
Power Status | Filter Slope | Input Sensitivity | Input Mode | Preouts From | Input Sensitivity | Filter Slope | |||||||
Indicator | Selection |
| Control |
| Selection |
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| Selection |
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| Control |
| Selection |
(pg. 16) | (pg. 11) |
| (pg. 10) |
| (pg. 9) | Remote Level | (pg. 13) |
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| (pg. 10) |
| (pg. 11) | |
Filter Mode | Filter Frequency | Input Voltage |
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| Control |
| Input Voltage | Filter Frequency | Filter Mode | ||||
Selection | Selector |
| Selection |
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| Selection |
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| Selection |
| Selector | Selection |
(pg. 11) | (pg. 11) |
| (pg. 10) |
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| (pg. 13) |
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| (pg. 10) |
| (pg. 11) | (pg. 11) |
Chassis Ground | Front Left & Right | Left & Right Preamp |
| Front | Rear | |||||
Connector | Channel Input Jacks |
| Output Jacks |
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| Speaker Outputs | Speaker Outputs | |||
(pgs. | (pg. 9) |
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| (pg. 13) |
| Jack for | (pgs. | (pgs. | ||
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+12 V Power | Remote | Rear Left & Right |
| Remote Level |
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Connector |
| Connector | Channel Input Jacks | Control Knob |
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(pgs. |
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| (pg. 9) |
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| (pg. 13) |
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+12 VDC Ground | Remote |
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| Front | Inputs | Rear | Preouts | Remote |
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| Level |
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| R |
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| R | Control |
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2 JL Audio - HD600/4 Owner’s Manual | 3 |