APPENDIX A:
Precise Frequency Selection Chart
“FILTER FREQ” CH 1&2 / CH 3&4
Detent Panel Actual
Number Marking Freq.
Full counter-clockwise: 58
01 . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 02 . . . . . . . . . . . “50” . . . . . . . . . . . .58 03 . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 04 . . . . . . . . . . . . . . . . . . . . . . . . . . . .58 05 . . . . . . . . . . . . . . . . . . . . . . . . . . . .59 06 . . . . . . . . . . . . . . . . . . . . . . . . . . . .60 07 . . . . . . . . . . . . . . . . . . . . . . . . . . . .61 08 . . . . . . . . . . . “60” . . . . . . . . . . . .63 09 . . . . . . . . . . . . . . . . . . . . . . . . . . . .65 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . .67 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . .69 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . .71 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . .74 14 . . . . . . . . . . . “75” . . . . . . . . . . . .77 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . .80 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . .82 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . .85 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . .90 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . .93 20 . . . . . . . . . . . “95” . . . . . . . . . . . .97 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . 102 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . 107 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . 127 26 . . . . . . . . . . “130” . . . . . . . . . . 135 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 28 . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 29 . . . . . . . . . . . . . . . . . . . . . . . . . . . 171 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
APPENDIX B:
Input Sensitivity Level Setting
APPENDIX A:
Input Sensitivity Level Setting
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
t%JHJUBM"$7PMUNFUFS
t$%XJUIBTJOFXBWFUFTUUPOFSFDPSEFEBU
0 dB reference level in the frequency range to be amplified for that set of channels
)[GPSTVCXPPGFSDIBOOFMTL)[GPS
a midrange application). The CleanSweep®
$BMJCSBUJPO%JTDDPOUBJOTUIFBQQSPQSJBUF
test tones and is available for sale at
3)4XJUDIUIFiInput VoltagewUPiLowwBOE UVSOUIFiInput Sens.wDPOUSPMPOCPUITFUTPG channels all the way down.
4)Set the source unit volume to 3/4 of full volume. If either set of channels is being driven by a source unit’s dedicated subwoofer output, also adjust the source unit’s subwoofer level control to 3/4 of maximum output. This will allow for reasonable gain overlap with moderate clipping at full volume.
5)Using the chart below, determine the target voltage for input sensitivity adjustment according to the nominal impedance of the speaker system connected to each set of outputs.
6)Verify that you have disconnected the speakers before proceeding. Play a track with an appropriate sine wave (within the frequency range to be amplified by each set of channels) at 3/4 source unit volume.
7)$POOFDUUIF"$WPMUNFUFSUPUIFiCH 1&2
Speaker OutputswPSiCH 3&4 Speaker
OutputswDPOOFDUPSTPGUIFBNQMJGJFS*GUIF
channel pair is operating in stereo, it is only necessary to measure one channel. If bridged, make sure you test the voltage at the correct connectors (L+ and
8)*ODSFBTFUIFiInput SenswDPOUSPMVOUJM
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),
TXJUDIUIFBQQSPQSJBUFiInput Voltagew TXJUDIUPiHighwBOESFBEKVTU
9)Once you have adjusted each set of channels to its maximum unclipped output level, reconnect
UIFTQFBLFS T 5IFiInput Sens.wDPOUSPMTDBO now be adjusted downward if either or both sets of channels requires attenuation to achieve the desired system balance.
!
I M P O RTA N T
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.
*UXJMMCFOFDFTTBSZUPSFBEKVTUUIFiInput
Sens.wGPSUIFBGGFDUFEDIBOOFMTJGBOZFRVBMJ[FS CPPTUJTBDUJWBUFEBGUFSTFUUJOHUIFiInput Sens.wXJUIUIJTQSPDFEVSF5IJTBQQMJFTUP
any EQ boost circuit, including the amplifier’s
iBass EQwBOETPVSDFVOJUUPOFDPOUSPMTPS&2
circuits. EQ cuts will not require
31 . . . . . . . . . . . . . . . . . . . . . . . . . . . 201 32 . . . . . . . . . . “200” . . . . . . . . . . 223 33 . . . . . . . . . . . . . . . . . . . . . . . . . . . 253 34 . . . . . . . . . . . . . . . . . . . . . . . . . . . 289 35 . . . . . . . . . . . . . . . . . . . . . . . . . . . 337 36 . . . . . . . . . . . . . . . . . . . . . . . . . . . 404 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . 474 38 . . . . . . . . . . “500” . . . . . . . . . . 514
Full-clockwise: 542
http://store.jlaudio.com%POPUVTFBUUFOVBUFE
test tones
The Nine-Step Procedure
(follow this procedure for each pair of channels)
1)%JTDPOOFDUUIFTQFBLFS T GSPNUIF BNQMJGJFSTiFront Speaker OutputswBOE iRear Speaker OutputswDPOOFDUPST
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 450/4v2).
Nom. | CHANNELS 1&2 | CHANNELS 3&4 | ||
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Impedance | Stereo | Bridged | Stereo | Bridged |
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8Ω | 24.5 V | 49.0 V | 17.3 V | 34.6 V |
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6Ω | 24.5 V | 42.4 V | 17.3 V | 30.0 V |
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4Ω | 24.5 V | 34.6 V | 17.3 V | 24.5 V |
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|
3Ω | 21.2 V | 30.0 V | 15.0 V | 21.2 V |
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|
2Ω | 17.3 V | not recommended | 12.2 V | not recommended |
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| 1.5Ω | 15.0 V | not recommended | 10.6 V | not recommended |
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22 JL Audio - 450/4v2 Owner’s Manual | 23 |
