JL Audio 505 - Manual (Page 13)

JL AUDIO 500/5 25
4) If you would like to run a third amplifier in
“Slave” configuration, select the “Full-Range”
position on the “Output Mode” switch of the first
“Slave” amp.Then, connect an RCA cable from
the first “Slave” amplifier’s preamp outputs to the
second “Slave” amplifier. As you did with the first
“Slave” amp, set the second “Slave” amplifier’s
“Amp LP Filter” to the “Off” position.Then,
calibrate the third amplifier’s “Input Range” and
“Input Sens.” controls in the same manner as you
did for the second amplifier.
Additional amplifiers may be added to this
“Master/Slave” configuration following the same
procedure as in step 4.
Once you match the input sensitivities of all
the amplifiers, you can use the “Master” amplifier’s
“Sub LP Filter”, “Infrasonic Filter” and “LF Boost”
features to control the “Slave” amplifier(s).
The diagram below shows a Master/Slave
configuration with one “Master” 500/5 (top
amplifier) and two “Slave” 250/1 amplifiers.
Switches and controls that are defeated in the
“Slave” amplifiers are printed in gray.
NOTE: These settings are intended
as a “baseline” for tuning this system. Depending
on the vehicle, personal taste and the audio
components specific to your system, some
variation in the Subwoofer Channel Control
Section, Filter Sections and Input Sections may be
necessary for optimum performance.
JL AUDIO 250/1
monoblock subwoofer amplifier
+12VDC Ground Remote Amplifier Input Section
Input Sens. Input Voltage
Low/High Off/On
Left Ch. Right Ch.
Amp LP Filter Bass Control Preamp Output Section
Mode/Slope
Subwoofer Output
Left Ch. Right Ch.
Infrasonic Filter Signal Sensing
MONO OUTPUT ONLY
Off/12dB/24dB Off/30Hz Full-Range/Low-Pass/High-Pass
0
+1
+3
+7
+10
+13
40 200 +15
45
55 85
65
120
Filter Freq. (Hz) LF Boost (dB)
Output Mode
Front Input Section
Input Sens. Input Voltage
Low/High
Left Ch. Right Ch.
Front Filter Section
Freq. Range
x1/x10
HP Filter Freq.(Hz)
Front Speaker Outputs
Filter Slope
12dB/24dB
Filter Mode
Off/BP/HP
Rear Speaker Outputs (25Wx2) Rear Input Section
Input Sens. Input Voltage
Low/High
Left Ch. Right Ch.
L-R Ambience
Off/On
ar Filter Section
Range
x10
eq. (Hz)
High-Pass Filter
Off/12dB/24dB
F/R Input Mode
2ch/4ch
Also sets low-pass cutoff for
Front Ch.
Bandpass filter (when selected)
Rear Inputs
Only
Front and
Rear
Connect 500/5 Input to Output from Source Unit
SLAVE (B):
The last Slave amplifier’s bass processing features are inactive.The
“Amp LP Filter” and “Preamp Output” are also inactive.
24 JL AUDIO 500/5
APPENDIX C:
Master/Slave Configurations
With the flexible on-board crossovers and
processing incorporated into the 500/5, it is
possible to connect additional JL Audio 250/1
amplifiers in a “Master/Slave” configuration, with
each amplifier driving its own speaker system but
controlled by the processing and filtering of the
500/5's subwoofer section.This is very useful if
additional subwoofer power is desired in a system.
To create a Master/Slave configuration,
configure the 500/5's subwoofer section as you
would normally do to drive one subwoofer
system, then do the following to connect
additional slave amplifiers:
1) In the Preamp Output Section of the 500/5
select the “Sub LP” position on the “Signal From”
switch. This will send a parallel, mono-summed
signal from the 500/5's “Sub LP Filter” section to
its preamp outputs.
2) Connect an RCA cable from the 500/5's
preamp outputs to the main input of the first
“Slave” 250/1 amplifier. Set the “Slave” amplifier’s
“Amp LP Filter” to the “Off” position.This will
defeat the LP filter and the bass processing of this
“Slave Amplifier”.
3) The input sensitivity of the two amplifiers
needs to be adjusted independently. Set the
subwoofer channel of the 500/5 and the slave
250/1 amplifier to the same target voltage using
the procedure outlined in Appendix B (page 22).
Do not increase the “Input Sens.” setting for
any amplifier channel in the system beyond the
maximum level established during the procedure
outlined in Appendix B (page 22). Doing so
will result in audible distortion and possible
speaker damage.
JL AUDIO 250/1
monoblock subwoofer amplifier
+12VDC Ground Remote Amplifier Input Section
Input Sens. Input Voltage
Low/High Off/On
Left Ch. Right Ch.
Amp LP Filter Bass Control Preamp Output Section
Mode/Slope
Subwoofer Output
Left Ch. Right Ch.
Infrasonic Filter Signal Sensing
MONO OUTPUT ONLY
Off/12dB/24dB Off/30Hz Full-Range/Low-Pass/High-Pass
0
+1
+3
+7
+10
+13
40 200 +15
45
55 85
65
120
Filter Freq. (Hz) LF Boost (dB)
Output Mode
JL AUDIO 500/5
five-channel system amplifier
+12VDC Ground Remote Rea
Freq. R
x1/x
Filter Fre
Subwoofer Output (250Wx1)
Sub LP/F+R Inputs/Front
Subwoofer Channel Control Section
Input Sens. Input Voltage
Low/High
Independent Sub Input
Sub LP Filter
Off/12dB/24dB
Preamp Output Section
Signal From
Filter Freq. (Hz)
Remote Bass
Port
Off/30Hz
LF Boost (dB)
Input From:
Ind./F+R/Front
Infrasonic Filter
Left Right
Left Ch. Right Ch.
+1 +13
+3 +7 +10
Connect 500/5 Preamp Output to 250/1 (Slave A) Input
Connect 250/1 (Slave A) Preamp Output to 250/1 (Slave B) Input
MASTER:
SLAVE (A):
The Master amplifier’s bass processing features are
active and affect all three amplifiers equally.
This Slave amplifier’s bass processing features are inactive,
but the Full-Range (pass-through) feature of its “Preamp
Output” feeds the input of the next Slave amplifier.