JL Audio 450/4V2 owner manual Appendix a, Appendix B

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

+-
"VEJP
BNQMJGJFST
VUJMJ[JOH
UIF
3FHVMBUFE

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

$%
XJUI
B
TJOFXBWF
UFTU
UPOF
SFDPSEFE
BU

0 dB reference level in the frequency range to be amplified for that set of channels


)[
GPS
TVCXPPGFS
DIBOOFMT

L)[
GPS

a midrange application). The CleanSweep®

$BMJCSBUJPO
%JTD
DPOUBJOT
UIF
BQQSPQSJBUF

test tones and is available for sale at

3)4XJUDI
UIF
iInput Voltagew
UP
iLoww
BOE
UVSO
UIF
iInput Sens.w
DPOUSPM
PO
CPUI
TFUT
PG
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)

$POOFDU
UIF
"$
WPMUNFUFS
UP
UIF
iCH 1&2

Speaker Outputsw
PS
iCH 3&4 Speaker

Outputsw
DPOOFDUPST
PG
UIF
BNQMJGJFS
*G
UIF

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 R–).

8)

*ODSFBTF
UIF
iInput Sensw
DPOUSPM
VOUJM

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),

TXJUDI
UIF
BQQSPQSJBUF
iInput Voltagew
TXJUDI
UP
iHighw
BOE
SFBEKVTU

9)Once you have adjusted each set of channels to its maximum unclipped output level, reconnect

UIF
TQFBLFS T 
5IF
iInput Sens.w
DPOUSPMT
DBO
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.

*U
XJMM
CF
OFDFTTBSZ
UP
SFBEKVTU
UIF
iInput

Sens.w
GPS
UIF
BGGFDUFE
DIBOOFMT
JG
BOZ
FRVBMJ[FS
CPPTU
JT
BDUJWBUFE
BGUFS
TFUUJOH
UIF
iInput Sens.w
XJUI
UIJT
QSPDFEVSF
5IJT
BQQMJFT
UP

any EQ boost circuit, including the amplifier’s

iBass EQw
BOE
TPVSDF
VOJU
UPOF
DPOUSPMT
PS
&2

circuits. EQ cuts will not require re-adjustment.

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
%P
OPU
VTF
BUUFOVBUFE

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

The Nine-Step Procedure

(follow this procedure for each pair of channels)

1)%JTDPOOFDU
UIF
TQFBLFS T
GSPN
UIF
BNQMJGJFST
iFront Speaker Outputsw
BOE
iRear Speaker Outputsw
DPOOFDUPST

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
Impedance	Stereo	Bridged	Stereo	Bridged
8Ω	24.5 V	49.0 V	17.3 V	34.6 V
6Ω	24.5 V	42.4 V	17.3 V	30.0 V
4Ω	24.5 V	34.6 V	17.3 V	24.5 V
3Ω	21.2 V	30.0 V	15.0 V	21.2 V
2Ω	17.3 V	not recommended	12.2 V	not recommended
1.5Ω	15.0 V	not recommended	10.6 V	not recommended

22 JL Audio - 450/4v2 Owner’s Manual 23