JL Audio HD600-4 User Manual

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owner’s manual

4-ChannelClass-DFull-RangeAmplifier

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) 443-1100during business hours.

Protect Your Hearing!

We value you as a long-termcustomer. 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 otherhigh-poweramplifiers are capable of producing such high sound pressure levels when connectedto 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-groundelectrical

advanced type of heat management, called

well-ventilatedenvironment 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-upand 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-coolingis 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

3

Product Description

The JL Audio HD600/4 is a very powerful and compact four-channel, full-range amplifier utilizing patented Single Cycle Control™

Class D technology for all channels. This groundbreaking technology delivers referencegrade sonic performance while requiring

far less current from the vehicle’s electrical system than a conventional amplifier.

JL Audio’s exclusive R.I.P.S. power supply design optimizes the output of each channel pair for any impedance between 1.5 and 4 ohms per channel (3-8 ohms bridged) allowing you to get full use of the HD600/4’s performance capabilitieswith a wide range of speaker systems.

The tightly regulated power supply design also means that the HD600/4’s clean power output capability remains stable over a wide range of vehicle voltages, resulting in enhanced fidelity.

The HD600/4 flexible, studio-gradesignalprocessing allows it to be deployed in a wide range of system applications:

1)As a four-channel(150W x 4)full-rangeamplifier, deliveringfull-rangesignals to two separate stereo speaker systems (front and rear, for example).

2)As a powerful (150W x 4) four-channelsatellite amplifier in abi-amplifiedsystem, deliveringhigh-passedsignals to front and rear speakersystems. Preamp outputs permit connection of a separate amplifier to drive the subwoofer system.

3)As a 600W full-systemamplifier inbi-amplified mode with one channel pair driving subwoofers in low-pass mode (150W x 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-rangeamplifier, deliveringfull-rangesignals to a stereo speaker system.

5)As a very powerful (300W x 2) two-channelsatellite amplifier in abi-amplifiedsystem, deliveringhigh-passedsignals to a stereospeaker system. Preamp outputs permit connection of a separate amplifier to drive the subwoofer system.

6)As a powerful (300W x 2) two-channelsubwoofer amplifier in a bi-amplified system, delivering low-passed signals to a dual subwoofer system. Preamp outputs permitconnection of a separate amplifier to drive the satellite speakers.

The HD600/4’s flexible input and crossover sections permit operation with a wide variety of source units and system configurations. It can be operated with a single pair of stereo inputs or with separate inputs for its front and rear channels.

The HD600/4’s preamp output can send pass- through signals from the Front Inputs only or it can sum all four input channels to feed a nonfading signal to a separate subwoofer amplifier.

As we said, it’s very flexible.

Typical Installation Sequence

The following represents the sequence for a typical amplifier installation, using an aftermarket source unit or OEM Interface processor (like the CleanSweep® CL441dsp).

Additional steps and different procedures may be required in some applications. If you have any questions, please contact your authorized JL Audio dealer for assistance.

1) Disconnect the negative battery post connection and secure the disconnected cable to prevent accidental re-connection during installation. This step is not optional!

2) Run power wire from the battery location

to the amplifier mounting location, taking care to route it in such a way that it will not be damaged and will not interfere with vehicle operation. 4 AWG is recommended for wire runs greater than 72 inches (180 cm) in length. Use of 8 AWG power wire is acceptable for shorter runs, such as from a power distribution block to the amplifier or

from a trunk-mountedbattery. Use a 2 AWG or 1/0 AWG main power wire with a power distribution block when additional amplifiersare being installed with the HD600/4 and powered from the same main power wire.

3) Connect power wire to the positive battery post. Fuse the wire with an appropriate fuse block (and connectors) within 18 inches (45 cm) wire length of the positive battery post. This fuse is essential to protect the vehicle.

Do not install the fuse until the power wire has been connected to the amplifier.

4) Run signal cables (RCA cables) and remote turn-onwire from the source unit or interface processor to the amplifier mounting location.

5) Run speaker wire from the speaker systems to the amplifier mounting location.

6) Find a good, solid, bare metal grounding point close to the amplifier and connect the negative power wire to it using appropriate hardware. Use minimum 8 AWG power wire, no longer than 36 inches (90 cm) or 4 AWG wire up to 60 inches (150 cm) long from theamplifier to the ground connection point. In some vehicles, it may be necessary to upgrade the battery’s ground wire as well. (See page 7 for important notice).

7) Securely mount the amplifier using appropriate hardware. (See page 8 for detailed mounting instructions).

8)Connect the remote turn-onwire and the positive and negative power wires to the amplifier’s power connector plug. Then insert the power connector plug into the amplifier’s power connector receptacle, pushing firmly.

9) Connect the RCA input cables

to the amplifier.

10)Connect the speaker wires to the speaker connector plugs and insert the plugs firmly into the speaker connector receptacles.

11)Carefully review the amplifier’s control settings to make sure that they are set according to the needs of the system.

12)Install power wire fuse (50A for a

single HD600/4) and reconnect the negative battery post terminal.

13)Turn on the source unit at a low level to double-checkthat the amplifier is

configured correctly. Resist the temptation to crank it up until you have verified the control settings.

14)Make necessary adjustments to the input sensitivity controls to obtain the right overall output and the desired balance

in the system. See Appendix C (pages 18, 19) for the recommended input sensitivity setting method.

15)Enjoy the fruits of your labor with your favorite music.

4 | JL Audio - HD600/4 Owner’s Manual

5

Power and Turn-onConnections

Before installing the amplifier, disconnect the negative (ground) wire from the vehicle’s battery. This will prevent accidental damage to the system, the vehicle and your body during installation.

+12 VDC Ground Remote

Front

+12V Battery Connection

You will need to connect a power wire to the vehicle’s positive battery terminal, using an appropriate power ring or specialized battery terminal connector, such as the JL Audio XB-BTU.This connection must be tight and

corrosion-freeto ensure proper connectivity. This wire MUST be fused appropriately for safety. Any positive power wires run through metal barriers (such as firewalls), must be protected with a high quality insulating grommet to prevent damage to the insulation of the wire. Failure to do so may result in a dangerous short circuit.

Power Wire Requirements

The HD600/4’s “+12 VDC”and “Ground”connections are designed to accept 4 AWG power wire. 4 AWG pure copper wire is recommended for any power wire run longer than 72 inches (180 cm). For runs shorter than 72 inches, 8 AWG pure copper power wire is acceptable.

If you are installing the HD600/4 with other amplifiers and wish to use a single main power wire, use 2 AWG or 1/0 AWG pure copper wire as a main power wire. This 2 AWG or 1/0 AWG power wire should terminate into a distribution block mounted as close to the amplifiers as possible and should connect to the HD600/4 with

4 AWG or 8 AWG pure copper power wire.

Please note that lower AWG numbers mean bigger wire and vice-versa (1/0 AWG is the largest, 2 AWG is smaller, then 4 AWG, then 8 AWG, etc.).

We do not recommend the use of “copperclad aluminum wire” or “CCA” wire because this wire is significantly less conductive than pure copper wire. Only use pure copper power wire, such as JL Audio’s MetaWire™. Tinned copper wire (silver color) is acceptable as the tin-platingis only a very minor component of the wire.

Fuse Requirements

The installation of a fuse on the main power wire, within 18 wire inches (45 cm) of the positive battery terminal is vital to protect the wire and the vehicle from fire in the event of a collision

or short-circuit.The fuse value at each power wire should be just high enough for all of theequipment being run from that power wire. Do not use a fuse with a value that far exceeds the total fuse rating of the electronics connected to the wire.

If only the HD600/4 is being run from that power wire, we recommend a 50A fuse be used. AGU (big glass fuse). AFS (small blade fuse)

or MaxiFuse™ (big plastic-bodyfuse) types are recommended. If other amplifiers are also being powered from the wire and exceed 80 amps in total fuse rating, we recommend the use of an

ANL (large-blade)fuse and holder. Please consultwith your JL Audio dealer to make sure that the wire, fuse holder and fuse rating you have selected are appropriate for your system’s needs.

If other amplifiers are also being powered from a main power wire and exceed 80 amps in total fuse rating, we recommend the use of an ANL (large-blade)fuse and holder. Each amplifier can then be fused independently at the outputs of

the power distribution block. Use JL Audio part

XC-FOA-2PAKand appropriate MaxiFuse™ typefuses with JL Audio distribution blocks.

Please consult with your JL Audio dealer to make sure that the wire, fuse holder and fuse ratings are appropriate for your system’s needs. The safety of your installation depends on appropriate power connections and fuse protection.

6 | JL Audio - HD600/4 Owner’s Manual

Ground Connection

The chassis ground connection must be made using 4 AWG or 8 AWG pure copper wire and should be kept as short as possible, while accessing a solid piece of sheet metal in the vehicle. The surface of the sheet metal

should be sanded at the contact point to create a clean, metal-to-metalconnection between the chassis and the termination of the ground wire with a brass or copper power ring. For optimal grounding, we recommend the

use of a JL Audio ECS master ground lug (XB-MGLU).Alternatively, a sheet metal screw or bolt can be used with a star washer.

Many vehicles employ small (10 AWG - 6 AWG) wire to ground the battery to the vehicle chassis and to connect the alternator’s positive connection to the battery. To prevent voltage drops, these wires should  be upgraded to 4 AWG pure copper wire when installing amplifier systems with main fuse ratings above 60A.

Turn-OnWire

The HD600/4 uses a conventional +12V remote turn-on wire, typically controlled by the source unit’s remote turn-on output. The amplifier will turn on when +12V is present at its“Remote” input and turn off when +12V is switched off. Ifa source unit does not have a dedicated remote turn-on output, the amplifier’s turn-on lead can be connected to +12V via a switch that derivespower from an ignition-switched circuit.

The HD600/4’s “Remote” turn-onconnector is designed to accept 18 AWG – 12 AWG wire. 18 AWG is more than adequate for this purpose.

To connect the remote turn-onwire to the amplifier, first back out the set screw on thebottom of the Power Connector Plug, using the supplied hex wrench. Strip 1/2 inch (12mm) of wire and insert the bare wire into the receptacle, seating it firmly so that no bare wire is exposed. When using smaller wire, it may be necessary to strip 1 inch of insulation from the wire and fold the bare wire in half prior to insertion. While holding the wire in the terminal, tighten the

set screw firmly using the supplied 2.5 mm hex wrench, taking care not to strip the head of the screw and making sure that the wire is firmly gripped by the set screw.

Amplifier Power Connector Plug

To connect the power wires and the remote turn-onwire to the amplifier, unplug the power connector plug from the amplifier chassis (pull back firmly) and back out the set screws on

the connector plug, using the supplied 4 mm hex wrench for the +12 VDC” and“Ground”

connections and the supplied 2.5 mm hex wrench for the “Remote” connection. Strip 3/8 inch (10 mm) of insulation from the end of each wire and insert the bare wire into the receptacle on power connector plug, seating it firmly so that no bare wire is exposed. While holding each wire in place, tighten each set screw firmly, taking care not to strip the head of the screw.

Never make power connections with a “live” wire. Always disconnect the negative battery post before making any connections or adjustments to a 12V power connection!

7

AMPLIFIER MOUNTING OPTIONS

The HD600/4 has two mounting options to ease in installation.

Standard Mounting

The standard method of mounting requires removal of the four corner caps with the 3/16-inch hex wrench included with your amplifier. Using appropriate mounting screws (not included), secure the amplifier in all four corners and replace the corner caps.

Lateral Mounting Feet

Lateral Mounting Feet are also included with your HD600/4 to provide an alternative mounting option. Each mounting foot should be attached to the bottom of the amplifier by screwing the provided bolt into the bottom of the amplifier and up into the corner cap with the supplied1/8-inchhex wrench. Next, using appropriate mounting screws (not included), secure the amplifier by its four Lateral Mounting Feet.

Check before drilling any holes in your vehicle to make sure that you will not be drilling through a gas tank, brake line, wiring harness or other vital vehicle system.

ConTROL PAnel SECURITY CoVER

The HD600/4 features a Control Panel Security

Cover. When installed, the cover ensures that your amplifier settings are not accidentally changed while creating a clean aesthetic for the amplifier and your installation. The control panel security cover is pre-installedat the factory and must be temporarily removed for access to the controls described throughout this manual.

The security cover is secured by a single 2.5 mm hex-headscrew at the far right of the panel. Loosen thehex-headscrew to release the security cover (it is not necessary to completely remove the screw). Tore-installthe security cover once all adjustments have been made, insert the tongue on the cover’s left edge into the groove where the leftside heatsink meets the control panel, hinge the panel closed and secure the screw using thesupplied 2.5 mm hex wrench. Do not overtighten the screw.

AMPLIFIER INPuTS

The HD600/4 has two separate input sections, one for the “Front” left and right channels and another for the “Rear” left and right channels.

Each section consists of a pair of RCA-typeinputjacks on the Connection Panel of the amplifier and a pair of input controls on the Control Panel of the amplifier: an “Input Voltage” switch and an “Input Sens.” rotary control.

ote

L

 

Front

Inputs

Rear

 

R

 

“Input Mode” Switch

The Control Panel houses an “Input Mode” switch located under the “General Setup” heading. This switch allows operation of all four amplifier channels with only one pair of input signals or with independent front and rear input signal pairs.

To use separate inputs for the “Front” and“Rear” amplifier sections, (in order to permitfront-to-rearfading, for example), select“4 Ch.” on the“Input Mode” switch. In this mode, you must connect separate pairs of input cables to the“Front” and“Rear” amplifier inputs.

To operate all four channels of the HD600/4 with a single pair of stereo inputs, select the

“2 Ch.” position on the “Input Mode”switch and connect a single pair of input cables to the “Front”input jacks only. In this mode, the amplifier will route the signals connected to the “Front”inputs to the Front and Rear amplifier channels.

CHANNEL CONTROL SECTIONS

Flanking the “General Setup” sectionon the Control Panel of the amplifer are two sets of identical controls: one for the

“Rear Channel Controls” (on the left side) and one for the “Front Channel Controls”of the amplifier (on the right side).

In each of these sections you will find an “Input Voltage” range switch and a rotary control labeled“Input Sens.” (Input Sensitivity). These controls are designed to match the inputsensitivity of the HD600/4 to the specific signal source that is feeding it and must be adjusted, with care, following the procedures outlined in this manual. Failure to make correct adjustments can result in weak output, excessive distortion and/or undesirable noise in the audio output of the amplifier!

Note: The Channel Control sections also house

“Filter Mode”, “Filter Slope”and “Filter Freq.”controls. These are crossover filter controls

and will be discussed in the next section of this manual. This section will explain the Input Controls only.

8 | JL Audio - HD600/4 Owner’s Manual

9

“Input Voltage” Switch

A wide range of signal input voltages can be accommodated by each of the HD600/4’s

differential-balancedinputs (200mV – 8V RMS). This wide range is split up into twosub-ranges,accessible via the“Input Voltage” switches located in each input section of the amplifier. Be aware that each input section’s“Input Voltage” switch will have to be configured, regardless of how many input cables are actually feeding the amplifier.

The “Low”position on each “Input Voltage”switch selects an input sensitivity range between 200mV and 2V. This means that the “Input Sens.”rotary control will operate within that voltage window. If you are using an aftermarket source unit, with preamp-level outputs, this is most likely the position that you will use (regardless of what voltage output capability is claimed by the source unit).

The “High”position on each “Input Voltage”switch selects an input sensitivity range between 800mV and 8V. This is for use with speaker-level outputs from source units and small amplifiers found in many 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).

The output of the amplifier decreases for a given input voltage when the “Input Range” switch is placed in the “High” position. The output increases with the switch in the “Low” position. While this may sound counterintuitive, it is correct as described.

“Input Sens.” Control

Located next to the “Input Voltage” switch in each input section is a rotary control labeled“Input Sens.”. Once the appropriate“Input Voltage” range has been selected, this control can be used to match the source unit’s output voltage to the input stage of each pair of amplifier

channels for maximum clean output. Rotating the control clockwise will result in higher sensitivity (louder for a given input voltage). Rotating the control counter-clockwisewill result in lower sensitivity (quieter for a given input voltage). To properly set each pair of amplifier channels for maximum clean output, please refer to Appendix

C (pages 18, 19) in this manual.

After using this procedure, you can then adjust the relative level of each channel pair by adjusting the input sensitivity downward on either or both channel pairs, if they require attenuation to achieve the desired system balance.

Do not increase the “Input Sens.” setting for any amplifier in the system beyond the maximum level established during the procedure outlined in

Appendix C (pages 18, 19). Doing so will result in audible distortion and possible speaker damage.

Be aware that both “Input Sens.” adjustments will have to be made, regardless of how many input cables are feeding the amplifier. These controls will allow you to set the appropriate relative levels for the“Front” channels relative to the“Rear” channels and any other amplifier channels in the system.

CROSSOVER CONTROLS

Crossovers are groups of electronic filters designed to control the frequency ranges that each speaker in a system will be tasked with reproducing. Proper crossover setup is critical to sound quality and reliability.

The HD600/4 has two individual filters, one for the “Front” channels and the other for the “Rear” channels. Each can be

configured as a high-passfilter (attenuates low frequencies) or as alow-passfilter (attenuates high frequencies). Additionally, the user can select from a shallow (12dB/octave) filter slope or a more aggressive (24dB/octave) slope.

Each Channel Control section contains identical crossover filter controls.

1)“Filter Mode” Control: this switch allows youto configure the filter for that Channel Pair into one of two filter types.

“Off”: Defeats the filter completely, allowingthe full range of frequencies present at the inputs to feed that pair of channels. This

is useful for systems utilizing outboard crossovers or requiring full-rangereproduction from that pair of channels.

“HP” (High-Pass):Configures the CH 1&2 filter to attenuate frequencies below the selected filter frequency. Useful for connection of component speakers in abi-amplifiedsystem.

“LP” (Low-Pass):Attenuates frequencies above the selected filter frequency. Useful for connection of subwoofer(s)

in a bi-amplifiedsystem.

2)“Filter Slope” Control: This switch allows you to select from two filter slopes.

“12dB”: Configures the filter to attenuate frequencies above or below the selected filter frequency at a rate of 12 dB per octave (Butterworth alignment).

“24dB”: Configures the filter to attenuate frequencies above or below the selected filter frequency at a rate of 24 dB per octave(Linkwitz-Rileyalignment).

Depending on the speaker system and the vehicle, different filter slopes may be required to produce a smooth transition between the sound of different speakers in the system.

In high-passmode, the sharper“24dB” setting will do a better job of protecting small speakers with limited power handling. Inlow-pass

mode, the “24dB” setting can also help by more aggressively removing lower midrange output from a subwoofer system.

The shallower “12dB” octave setting allows for more output overlap between the speakers being crossed over. In manycases, this will result in a smoother “blend” or transition between speaker systems.

Experiment to find the slope or combination of slopes which best matches the acoustic requirements of your system.

3)“Filter Freq. (Hz)” Control:

This control selects the frequency at which the filter begins to attenuate the signal and refers specifically to the frequency at which output has been attenuated by -3dB.

The filter frequency markings surrounding this rotary control are for reference purposes and are generally accurate to within 1/3 octave or better. If you would like to select the filter cutoff frequency with a higher level of precision, consult the charts in Appendix B (page 18) of this manual.

10 | JL Audio - HD600/4 Owner’s Manual

11

Bi-AmpLIFIED SYSTEMS

Bi-amplifiedsystems are defined as systems in which separate amplifier channels drive lowfrequency (LF) andhigh-frequency(HF) speakers and are separately filtered to send appropriate frequency ranges to each speaker system.

The most common application of bi-amplificationin mobile audio is to drive a subwoofer system from one or more amplifiers or channels and component speakers from separate amplifiers or channels.

The HD600/4 can be configured to drive a bi-amplified system by itself or with a separate subwoofer amplifier.

Bi-AmplifiedSystem with one HD600/4

In this configuration, the “Rear” channelsof the HD600/4 will drive subwoofers

(stereo 150W x 2 or bridged 300W x 1) with low-passfiltering. The“Front” channels will drive component speakers in stereo (150W x 2) withhigh-passfiltering.

Crossover Setup for Bi-AmplifiedSystem with one HD600/4:

Once the input sections have been configured appropriately, go to the “Rear Channel Controls” Section. Select“LP” (low-pass)on the“Filter Mode” switch and“12dB” or“24dB” on the

“Filter Slope” switch and an appropriate“Filter Freq.” (80-90 Hz is a good starting point).

Next, turn your attention to the “Front Channel Controls” Section. and select“HP”

(high-pass)on the“Filter Mode” switch and

“12dB” or “24dB”on the “Filter Slope”switch and an appropriate “Filter Freq.”

(again, 80-90Hz is a good starting point).

After proper adjustment of the Front and Rear channel “Input Range” and“Input Sens.” controls using the method shown

in Appendix C (pages 18, 19), you can fine tune filter frequencies and slopes and attenuate either pair of channels to achieve proper balance. For precise filter frequency information refer to Appendix B (page 18).

Bi-AmplifiedSystem with one HD600/4 infour-channelmode and a separate subwoofer amplifier

This configuration requires that the separate subwoofer amplifier has a built-inlow-passfilter. In this configuration, the

“Front” channels of the HD600/4 will drivefront component speakers (stereo 150W x 2) with high-pass filtering. The “Rear” channels will drive rear component speakers in stereo (150W x 2) with high-pass filtering.

The separate subwoofer amplifier will drive the subwoofer system with low-passfiltering (select afilter frequency of 80-90 Hz to start). The inputs of the subwoofer amplifier can be fed from the

HD600/4’s preamp output or from a dedicated subwoofer output on the source unit.

Crossover Setup for Bi-AmplifiedSystem with one HD600/4 and a separate subwoofer amplifier:

Once the input and preamp output sections have been configured appropriately, go to the

“Front Channel Controls” Section. Select “HP”

(high-pass)on the“Filter Mode” switch and

“12dB” or “24dB”on the “Filter Slope”switch and an appropriate “Filter Freq.”(80-90 Hz is a good starting point).

Next, turn your attention to the “Rear Channel Controls” Section and select“HP”

(high-pass)on the“Filter Mode” switch and

“12dB” or “24dB”on the “Filter Slope”switch and an appropriate “Filter Freq.”(again, 80-90 Hz is a good starting point).

After proper adjustment of the HD600/4’s and the subwoofer amplifier’s “Input Range” and “Input Sens.”, you can fine tune filter frequencies and slopes and attenuate either pair of channels to achieve proper balance. For proper adjustment of the “Input Sens.” controls of the HD600/4 use the method shown in Appendix C (pages 18, 19).

For precise filter frequency information for the

HD600/4 refer to Appendix B (pages 18). Refer to the subwoofer amplifier owner’s manual for its proper adjustment levels.

Preamp Outputs

The HD600/4 incorporates a pass-throughpreamp output section, so that additional amplifiers can easily be connected to the same signal(s) feeding the HD600/4. These preampoutput signals are accessible via a stereo pair of RCA-type jacks, labeled “Preouts”, on the

Connection Panel.

L

Preouts Remot

Level

Contro

R

The term “pass-through”refers to the fact that the Preamp Output signals are not affected by anycrossover filter or input sensitivity setting selected on the HD600/4 (if the input signal isfull-range,the Preamp Output will befull-range).Thesepreamp output signals are buffered to prevent noise and are always preamp level, regardless of the level of signals feeding the HD600/4’s inputs.

The pass-throughPreamp Outputs can beconfigured two different ways using the switch labeled “Preouts From” in the “General Setup” section of the Control Panel.

3)“F+R” (Front + Rear): This mode delivers asum of the signals being fed to the “Front Inputs” and the “Rear Inputs” of the amplifier. When the HD600/4 is being usedto drive front and rear speaker systems, this preamp output mode will deliver a summed front/rear signal to the subwoofer amplifier, while permitting fading of the front and rear speaker systems from the source unit.

REmote level control (OPTIONAL)

With the addition of the optional Remote Level

Control (HD-RLC),you can control the volume of one or both channel pairs of the HD600/4from the front of the vehicle. This is useful for subwoofer level control or even as a master volume control for the system.

The HD-RLCconnects to the jack labeled

“Remote Level Control” on the Connection

Panel of the amplifier using a standard telephone cable (supplied with the HD-RLC).

If desired, multiple HD amplifiers can be controlled from a single HD-RLCcontroller using a simple phone line “splitter” and multiplephone cables.

L

Preouts Remote

Level

Control

R

1)“Front”: The preamp output delivers the samesignal that is connected to the HD600/4’s

“Front Inputs”. This mode is useful for feeding a subwoofer amplifier when the

HD600/4 is being used to drive front and rear speaker systems. In this mode, the preamp output level will track with the signal level

of the front input signals, allowing the user to fade the rear channels in and out, without affecting the subwoofer level.

When connected to the amplifier, the HD-RLCoperates as follows. At full counter-clockwise rotation, the audio will mute completely. At full clockwise rotation the level will be the same as if theHD-RLCwas not connected at all. In otherwords, it operates strictly as a level attenuator.

Depending on the application, you may want the HD-RLCto only affect one channel pair orboth channel pairs. A switch labeled “Remote Level Control” in the “General Setup” Section of the Control Panel allows you to determine whether theHD-RLCaffects the level of allchannels “All Ch.” or only the rear channels

“Rear Ch.”

12 | JL Audio - HD600/4 Owner’s Manual

13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The RBC-1Remote Bass Control used with

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

JL Audio Slash, Slash v2, e-Series,A-Seriesand

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

G-Seriesamplifiers is NOT compatible with the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HD Series amplifiers. If you attempt to connect

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

an RBC-1to an HD amplifer, the control will

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

not work. You must use the HD-RLCcontroller.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

For example, if you are using the HD600/4 in a

Speaker OUTPUTS

stand-alonebi-amplifiedmode, you may want the

 

The HD600/4 employs JL Audio’s exclusive

HD-RLCto only affect the level of the subwoofer

Regulated, Intelligent Power Supply (R.I.P.S.)

channels. Setting the “Remote Level Control”

design. The operation of the R.I.P.S. system is

switch to the “Rear Ch.” position accomplishes

independent for each pair of channels. This

this (provided the subwoofer system is connected

sophisticated power supply allows the amplifier to

to the rear channels).

produce its optimum power (150 watts x 4) over a

In other cases, you may want control of all

wide range of speaker impedances.

four channels at the same time, so you would

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

set the “Remote Level Control”switch to the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“All Ch.” position.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unlike conventional amplifiers that require a specific impedance to produce optimum power, the R.I.P.S.-equipped HD600/4 gives you the freedom to use a variety of speaker configurations that achieve final nominal impedances between 1.5 – 4Ω per channel in

stereo (without sacrificing power output or sound quality). When bridged, each channel pair will optimize output at 300 watts between 3 – 8Ω.

The operation of the R.I.P.S. circuitry is entirely automatic and adjusts itself every time the amplifier is turned on. There are no user controls to configure. The system operates through multiple stages of impedance optimization, choosing the stage most appropriate to the actual impedance of the speakers you connect to it.

If you connect a load higher than 4Ω nominal per channel in stereo mode (or 8Ω in bridged mode), power will drop by half with every doubling of impedance above 4Ω stereo / 8Ω mono. If you connect a load lower than 1.5Ω nominal per channel in stereo mode (or 3Ω in bridged mode, the amplifier protection circuitry activates a “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.

Speaker loads below 1.5Ω nominal per channel in stereo or 3Ω nominal in bridged mode are not recommended and may cause the amplifier output to distort excessively.

Bridging Considerations

Bridging is the practice of combining the output of two amplifier channels to drive a single load. When bridged, each channel produces signals of equal magnitude, but opposite polarity. The combined output of the two channels provides twice the output voltage available from a single channel. The HD600/4 has been designed for bridging of its channel pairs without the need for input inversion adaptors.

To bridge a pair of channels, use the “Left +” and“Right –” speaker connectors only

(the “Left –” and “Right +” remain unused).

Then connect a mono signal to both left and right RCA inputs for that channel pair. This requires an RCA “Y-Adaptor” (sold separately), because a bridged pair of channels requires that both amplifier channels of the bridged pair receive input. Connection of only one RCA input will result in reduced power output, increased distortion and can cause the amplifier to overheat.

When bridged, each channel pair will deliver optimum power into a 3-8Ωload. Operating bridged channel pairs into a load lower than 3Ω is not recommended.

Speaker Connector Plugs

To connect the speaker wires to the amplifier, unplug the speaker connector plugs from the amplifier chassis (pull back firmly) and back out the set screws on each connector plug, using the supplied 2.0 mm hex wrench. Strip 3/8 inch (10 mm) of insulation from the end of each wire and insert the bare wire into the receptacle on the speaker connector plug, seating it firmly so that no bare wire is exposed. While holding each wire in place, tighten each set screw firmly, taking care not to strip the head of the screw.

14 | JL Audio - HD600/4 Owner’s Manual

15

“Status” LED / Protection Circuitry

There is a single multi-colorLED on thecontrol panel of the amplifier to indicate the amplifier’s operating status. This LED’s behavioris as follows:

1)Flashing Green: amplifier is powering up, audio output is muted.

2)Constant Green: amplifier is on and functioning normally, audio output is active.

3)Constant Red: lights to indicate that the amplifier has exceeded its safe operating temperature, putting the amplifier into aself-protectionmode, which reduces the peak power output of the amplifier. The red light will turn green and the amplifier will return tofull-poweroperating mode when its temperature returns to a safe level.

3)Constant Amber (yellow): lights to indicate that the impedance of the speaker load connected to the amplifier is lower than the optimum load impedance range for the

amplifier. When this light is on, a protection circuit engages and reduces the power output of the “Front” or the“Rear” channels, depending on which channel is experiencing the problem. The amber indicator will also light when ashort-circuitis detected in the speaker wiring (this can be a short between the positive and negative speaker wires or between either speaker wire and the vehicle chassis). This can be used to diagnose ashort-circuitby only connecting one of the amplifier sections at a time (“Front” or“Rear” channels). Theamber LED will light when you connect the section that is experiencing the problem and turn the volume up.

4)Alternating Red and Green: lights to indicate that the amplifier is experiencing a fault

that may require service of the amplifier, its wiring or the vehicle’s charging system. Audio is muted when this fault occurs. The most likely cause of this fault is a low supply voltage condition. If battery voltage drops below 8.5 volts at any point, the amplifier (except for the

“Status” LED) will shut itself off to protect itself and the vehicle’s charging system. If the voltage drops below 6 volts, the “Status” LED will alsoturn off.

The amplifier will turn back on automatically when voltage climbs back above 9 volts. This shut-downandturn-onbehavior may happen in a rapid cycle whenbass-heavyprogram material causes a weak charging system to momentarily dip too low. If this is happening in your system, have your charging system inspected to make sure it is working properly.

If no problem is found with the supply voltage to the amplifier and you are still seeing alternating Red and Green on the “Status” LED, it is likely that the amplifier is suffering from an internal fault that requires factory service.

For more information on troubleshooting this amplifier, refer to Appendix D (pages 20, 21).

There is only one condition that will shut down an undamaged HD600/4 completely…

If battery voltage drops below 10 volts, the entire amplifier will shut itself off to protect itself and the vehicle’s charging system. The

“Status” LED will turn off when this occurs. Theamplifier will turn back on when voltage climbs back above 11 volts. This may happen in a rapid cycle when bass-heavy program material causes a weak charging system to dip below 10 volts momentarily. If this is happening in your system, have your charging system inspected to make sure it is working properly. For information on troubleshooting this amplifier, refer to Appendix

D (pages 20, 21).

Servicing your JL Audio Amplifier

If your amplifier fails or malfunctions, please return it to your authorized JL Audio dealer so that it may be sent in to JL Audio for service. There are no user serviceable parts or fuses inside the amplifier. The unique nature of the circuitry in the JL Audio amplifiers requires specifically trained service personnel. Do not attempt

to service the amplifier yourself or through unauthorized repair facilities. This will not only void the warranty, but may result in the creation of more problems within the amplifier.

If you have any questions about the installation or setup of the amplifier not covered in this manual, please contact your dealer or technical support.

JL Audio Technical Support:

(954) 443-1100

9:00 AM – 5:30 PM (Eastern Time Zone)

Monday - Friday

Appendix A:

HD600/4 Specifications

Amplifier Topology: Class D, switching type with patented Single-CycleControl™ technology. Power Supply: Pulse widthmodulation-regulatedswitching power supply

Recommended Fuse Value / Type: 50A (AFS, AGU or MaxiFuse™)

Rated Power (Stereo):

150W RMS x 4 @ 1.5-4Ω(11V - 14.5V)

Rated Power (Bridged):

300W RMS x 2 @ 3-8Ω(11V - 14.5V)

THD at Rated Power: <0.03% @ 4Ω per channel (Average at 1 kHz)

Signal to Noise Ratio (20 kHz Bandwidth):

Referred to Rated Power: 110 dBA Referred to 1 Watt: 88.2 dBA

Frequency Response: 6 Hz - 30 kHz (+0, -1dB)Damping Factor:

300 @ 4Ω per ch. / 50 Hz

150 @ 2Ω per ch. / 50 Hz

Crossover Filters:

Filter Sets: Two (Front Channel and Rear Channel) Filter Type: State-variable,12 dB/octave Butterworth or 24 dB/octaveLinkwitz-Riley

Filter Modes: Low-PassorHigh-Pass,Defeatable. Cutoff Freq. Range: Continuously variable, 50 - 500 Hz

Input Sections:

No. of Inputs: Two Stereo Pairs (Front and Rear)

Input Type: Differential-balancedwith RCA jack inputs Input Range: Switchable from 200mV - 2V RMS (Low) to 800mV - 8V RMS (High)

Preamp Output:

2-Channel,bufferedpass-throughtype,switch-selectableto pass signal from “Front” inputs only, or from all four inputs (summed).

Chassis Dimensions (LxWxH):

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 - HD600/4 Owner’s Manual

17

Appendix B: 

Precise Frequency Selection Chart

 

“Filter FREQ”

 

Detent

Panel

Actual

Number

Marking

Freq.

Full counter-clockwise:53

01 . . . . . . “50” . . . . . .53 02 . . . . . . . . . . . . . . 53 03 . . . . . . . . . . . . . . 53 04 . . . . . . . . . . . . . . 53 05 . . . . . . . . . . . . . . 54 06 . . . . . . . . . . . . . . 56 07 . . . . . . . . . . . . . . 58 08 . . . . . . “60” . . . . . .60 09 . . . . . . . . . . . . . . 62 10 . . . . . . . . . . . . . . 64 11 . . . . . . . . . . . . . . 66 12 . . . . . . . . . . . . . . 68 13 . . . . . . . . . . . . . . 71 14 . . . . . . . . . . . . . . 74 15 . . . . . . . . . . . . . . 76 16 . . . . . . “80” . . . . . .80 17 . . . . . . . . . . . . . . 83 18 . . . . . . . . . . . . . . 87 19 . . . . . . . . . . . . . . 91 20 . . . . . . . . . . . . . . .94 21 . . . . . . . . . . . . . . 99 22 . . . . . . . . . . . . . . 104 23 . . . . . . . . . . . . . . 109 24 . . . . “12 o’clock” . . . 115 25 . . . . . . . . . . . . . . 121 26 . . . . . . . . . . . . . . 128 27 . . . . . . . . . . . . . . 137 28 . . . . . . . . . . . . . . 147 29 . . . . . . . . . . . . . . 160 30 . . . . . . . . . . . . . . 174 31 . . . . . . . . . . . . . . 191 32 . . . . . . . . . . . . . . 211 33 . . . . . “250” . . . . . 236 34 . . . . . . . . . . . . . . 269 35 . . . . . . . . . . . . . . 309 36 . . . . . . . . . . . . . . 369 37 . . . . . . . . . . . . . . 443 38 . . . . . “500” . . . . . 484 39 . . . . . . . . . . . . . . 525

Full-clockwise:528

Appendix C:

Input Sensitivity Level Setting

JL Audio amplifiers utilizing the Regulated

Intelligent Power Supply (R.I.P.S.) allow delivery of their rated power when connected to any load impedance from 1.5 - 4Ω per channel and when connected to a charging system with any voltage from 11 - 14.5V. This design is beneficial for many reasons. One of these reasons is ease of setup.

Because each JL Audio amplifier will always deliver the same amount of power within its operational range of impedances and supply voltages, the maximum, unclipped output is very predictable.

This makes setting the gain structure via the input sensitivity controls very simple. Following the directions below will allow the user to adjust the input sensitivity of the amplifier(s) simply and easily in just a few minutes using equipment which is commonly available in installation bays.

Necessary Equipment

Digital AC Voltmeter

CD with a sine-wavetest tone recorded at

0 dB reference level in the frequency range to be amplified for that set of channels (50 Hz for subwoofer channels, 1 kHz for a midrange application). The CleanSweep®

Calibration Disc contains the appropriate test tones and is available for sale at http://store.jlaudio.com Do not use attenuatedtest tones (-10 dB, -20 dB, etc.).

Do not increase any “Input Sens.” setting in the system beyond the maximum level established during this procedure. Doing so will result in audible distortion and possible speaker damage.

It will be necessary to re-adjustthe “Input 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.

The Nine-StepProcedure

(follow this procedure for each pair of channels)

1)Disconnect the Speaker Connector Plugs.

2)Turn off all processing on the source unit (bass/treble, loudness, EQ, etc.). Set fader control to center position and subwoofer level control to 3/4 of maximum (if

used to drive the HD600/4). Disconnect the HD-RLCRemote Level Controltemporarily (if one is being used).

3)Switch the “Input Voltage” to “Low” and turn the “Input Sens.” control on both sets ofchannels all the way down.

4)Set the source unit volume to 3/4 of full volume. If either set of channels is being driven by a source unit’s dedicated subwoofer output, also adjust the source unit’s subwoofer level control to 3/4 of maximum output. This will allow for reasonable gain overlap with moderate clipping at full volume.

5)Using the chart below, determine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to each set of outputs.

6)Verify that you have disconnected the Speaker

Connector Plugs before proceeding. Play a track with an appropriate sine wave (within the frequency range to be amplified by each set of channels) at 3/4 source unit volume.

7)Connect the AC voltmeter to the “Front Speaker Outputs” or “Rear Speaker Outputsconnectors of the amplifier. If the channel pair is operating in stereo, it is only necessary to measure one channel in the pair. If bridged, make sure you test the voltage at the correct connectors (L+ andR–).

8)Increase the “Input Sens.” control until

the target voltage is delivered for that set of channels. If excessive voltage is read on either set of channels with the control at minimum (full counterclockwise), switch the appropriate “Input Voltage” switch to “High” and re-adjust.

9)Once you have adjusted each set of channels to its maximum unclipped output level, reconnect the speaker(s). The “Input Sens.” controls can now be adjusted downward if either or both sets of channels requires attenuation to achieve the desired system balance.

Nom.

Front channels

Rear Channels

 

 

 

 

Impedance

Stereo

Bridged

Stereo

Bridged

 

 

 

 

 

 

24.5 V

49.0 V

24.5 V

49.0 V

 

 

 

 

 

24.5 V

42.4 V

24.5 V

42.4 V

 

 

 

 

 

24.5 V

34.6 V

24.5 V

34.6 V

 

 

 

 

 

21.2 V

30.0 V

21.2 V

30.0 V

 

 

 

 

 

17.3 V

not recommended

17.3 V

not recommended

 

 

 

 

 

1.5Ω

15.0 V

not recommended

15.0 V

not recommended

 

 

 

 

 

18 | JL Audio - HD600/4 Owner’s Manual

19