JL Audio HD600/4 Appendix B Precise Frequency Selection Chart, Appendix C, Necessary Equipment

Page 10

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

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-wave test 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 attenuated test tones (-10 dB, -20 dB, etc.).

The Nine-Step Procedure

(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-RLC Remote Level Control temporarily (if one is being used).

3)Switch the “Input Voltage” to “Low” and turn the “Input Sens.” control on both sets of channels 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 Outputs” connectors 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+ and R–).

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.

31 . . . . . . . . . . . . . . 191 32 . . . . . . . . . . . . . . 211 33 . . . . . “250” . . . . . 236 34 . . . . . . . . . . . . . . 269 35 . . . . . . . . . . . . . . 309 36 . . . . . . . . . . . . . . 369 37 . . . . . . . . . . . . . . 443 38 . . . . . “500” . . . . . 484 39 . . . . . . . . . . . . . . 525

Full-clockwise: 528

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-adjust the “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.

Nom.

Front channels

Rear Channels

 

 

 

 

Impedance

Stereo

Bridged

Stereo

Bridged

 

 

 

 

 

 

8Ω

24.5 V

49.0 V

24.5 V

49.0 V

 

 

 

 

 

6Ω

24.5 V

42.4 V

24.5 V

42.4 V

 

 

 

 

 

4Ω

24.5 V

34.6 V

24.5 V

34.6 V

 

 

 

 

 

3Ω

21.2 V

30.0 V

21.2 V

30.0 V

 

 

 

 

 

2Ω

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

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Contents Channel Class-D Full-Range Amplifier Serial Number Planning Your InstallationProtect Your Hearing Serial NumberProduct Description JL Audio HD600/4 is a very powerfulConnect the RCA input cables 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.
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