JL Audio HD600/4 owner manual Protect Your Hearing, Serial Number, Stupid Mistakes to Avoid

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Protect Your Hearing!

We value you as a long-term customer. For that reason, we urge you to practice restraint in the operation of this product so as not to damage your hearing and that of others in your vehicle. Studies have shown that continuous exposure to high sound pressure levels can lead to permanent (irreparable) hearing loss. This and all other high-power amplifiers are capable of producing such high sound pressure levels when connected to a speaker system. Please limit your continuous exposure to high volume levels.

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, negative-ground electrical

advanced type of heat management, called

well-ventilated environment and in a manner

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

 

amplifier with the outputs of a second amplifier,

ventilated chamber can lead to excessive heat

Stupid Mistakes to Avoid:

including an identical one.

build-up and degraded performance. If an

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, fan-cooling is not necessary.

• 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

 

 

edges and wear by carefully routing them,

 

 

tying them down and using grommets and

 

 

loom where appropriate.

 

 

• Do not mount the amplifier in the engine

 

 

compartment, under the vehicle, on the roof

 

 

or in any other area that will expose the

 

 

amplifier circuitry to the elements.

Power Status

Filter Slope

Input Sensitivity

Input Mode

Preouts From

Input Sensitivity

Filter Slope

Indicator

Selection

 

Control

 

Selection

 

 

Selection

 

 

Control

 

Selection

(pg. 16)

(pg. 11)

 

(pg. 10)

 

(pg. 9)

Remote Level

(pg. 13)

 

 

(pg. 10)

 

(pg. 11)

Filter Mode

Filter Frequency

Input Voltage

 

 

Control

 

Input Voltage

Filter Frequency

Filter Mode

Selection

Selector

 

Selection

 

 

 

Selection

 

 

Selection

 

Selector

Selection

(pg. 11)

(pg. 11)

 

(pg. 10)

 

 

 

(pg. 13)

 

 

(pg. 10)

 

(pg. 11)

(pg. 11)

Chassis Ground

Front Left & Right

Left & Right Preamp

 

Front

Rear

Connector

Channel Input Jacks

 

Output Jacks

 

 

Speaker Outputs

Speaker Outputs

(pgs. 6-7)

(pg. 9)

 

 

(pg. 13)

 

Jack for

(pgs. 14-15)

(pgs. 14-15)

 

 

 

 

 

 

 

 

 

 

+12 V Power

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)

 

 

+12 VDC Ground

Remote

 

L

 

 

L

 

 

 

 

 

 

Front

Inputs

Rear

Preouts

Remote

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Level

 

 

 

 

 

 

R

 

 

R

Control

 

 

 

 

 

 

 

 

 

 

 

2 JL Audio - HD600/4 Owner’s Manual

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Contents Channel Class-D Full-Range Amplifier Serial Number Planning Your InstallationProtect Your Hearing Serial NumberConnect the RCA input cables JL Audio HD600/4 is a very powerfulProduct Description Turn-On Wire +12V Battery ConnectionPower Wire Requirements Amplifier Power Connector PlugAmplifier Mounting Options Channel Control SectionsCROSSOVER CONTROLS Input Voltage SwitchInput Sens. Control Filter Freq. Hz ControlPreamp Outputs Bi-AmpLIFIED SYSTEMSBi-Amplified System with one HD600/4 REmote level control OptionalHD-RLC to only affect the level of the subwoofer For example, if you are using the HD600/4 in aSpeaker Connector Plugs RBC-1 Remote Bass Control used withStatus LED / Protection Circuitry Appendix a HD600/4 SpecificationsChassis Dimensions LxWxH Servicing your JL Audio AmplifierAppendix C Appendix B  Precise Frequency Selection ChartNine-Step Procedure Necessary EquipmentMy amplifier doesn’t turn on My amplifier turns on, but there is no outputINSTALLATION NOTES JL Audio, Inc Limited Warranty Amplifiers USAIf you need service on your JL Audio product International Warranties

HD600/4 specifications

JL Audio's HD600/4 amplifier stands as a testament to the brand's dedication to quality and performance in the realm of car audio. Renowned for delivering powerful, clean sound, this amplifier is designed to meet the needs of audiophiles and casual listeners alike. With a compact design and impressive specifications, the HD600/4 is a four-channel amplifier that provides robust power to enhance your listening experience.

One of the standout features of the HD600/4 is its high-efficiency Class D topology. This technology allows the amplifier to produce more power while consuming less energy, resulting in a cooler operating temperature and less strain on your vehicle’s electrical system. The efficient design also means that the HD600/4 can deliver an astounding 75 watts RMS per channel at 4 ohms, and even more power when configured at lower impedances. This ensures clear and dynamic audio reproduction across a wide range of sources, from music to voice.

The HD600/4 also incorporates JL Audio's advanced signal processing capabilities. With adjustable crossover settings, users can precisely tailor the sound to match their specific requirements. The built-in high-pass and low-pass filters allow for easy integration with subwoofers and other speakers, ensuring a seamless audio experience regardless of the setup. Additionally, the amplifier features a line/ speaker level input, making it versatile enough to work with various audio sources.

Durability is another hallmark of the HD600/4. Constructed with high-quality materials, it features a robust aluminum chassis that not only enhances aesthetic appeal but also provides effective heat dissipation. The amplifier's design includes thoughtful engineering features such as a variable gain control per channel and advanced protection circuitry that safeguards against overheating and short circuiting.

The sleek and compact design of the HD600/4 makes it easier for installation in various vehicle types without sacrificing valuable space. With a mounting depth of just over 6 inches, it can fit into tight spaces, making it an attractive option for those seeking high-performance audio without the bulk of traditional amplifiers.

In conclusion, the JL Audio HD600/4 embodies high-quality engineering, power efficiency, and adaptability. Its combination of advanced technologies, user-friendly features, and robust build quality make it a top choice for car audio enthusiasts looking to elevate their listening experience to new heights. With the HD600/4, users can expect nothing less than the exceptional audio performance that JL Audio is known for.