JBL Px300 4 Manual

car audio 
power amplifier
owner’s manual
THANK YOUfor purchasing a JBL Power Series®amplifier. 
In order that we may better serve you should you
require warranty service for your new amplifier, please
retain your original purchase receipt and return the
enclosed warranty registration card.
Power Series Amp OM  5/20/03  10:51 AM  Page 1 

INSTALLATION 
WARNING:Playing loud music 
in an automobile can hinder your 
ability to hear traffic and permanently 
damage your hearing. We recommend 
listening at low or moderate levels
while driving your car. JBL accepts 
no liability for hearing loss, bodily
injury or property damage resulting
from the use or misuse of this product.
IMPORTANT:To get the best
performance from your JBL Power
Series
®amplifiers, we strongly recom-
mend that installation be entrusted to 
a qualified professional....

APPLICATIONS – BPx MODELS
To the right are several application 
diagrams to help plan your subwoofer
system installation. 
Figures 1 through 3show how to configure the JBL Power
Series subwoofer amplifiers (models
BPx500.1, BPx1100.1 and BPx2200.1)
for 2-channel, bridged-mono and 
parallel-mono operation (also see
“Setting the Output Mode” on page 6). 
NOTE: For simplicity, Figures 1 through
3 do not show power, remote and input
connections.
NOTE: If the nominal impedance 
of your speaker system is close...

4
APPLICATIONS – Px600.2
The JBL Px600.2 amplifier can be 
set up for stereo or bridged-mono
operation, as shown in 
Figures 4 and 5. 
NOTE: For simplicity, Figures 4 and 5 
do not show power, remote and input
connections.
Px600.2(rear panel)
POWER
FUSES GND REM BATT SPEAKER OUTPUTS BRIDGED
STEREOPx600.2
L RNEONNEON
Subwoofer (4 ohms or greater)
Set MODE to LP;
INPUT MODE to MO
(on input panel)X-OVER
STINPUT
MODE MODE
SLOPEMO12dB 24dBFLAT HP LP32Hz 320Hz
FREQ
See “Setting the Crossover(s)”
on page 6 to...

5
APPLICATIONS – Px300.4
The JBL Px300.4 amplifier can be set
up for stereo or tri-mode operation, as
shown in 
Figures 6 and 7. 
NOTE: For simplicity, Figures 6 and 7 do 
not show power, remote and input 
connections.
Px300.4(rear panel)
POWER
FUSES GND REM BATT Px300.4SPEAKER OUTPUTSSPEAKER OUTPUTS STEREO
REARFRONT
L R L RBRIDGEDNEONNEON
-
+
+
-
LF
System
+
-
RF
System
Subwoofer
Set REAR
X-OVER MODE to LP
(on input panel)
FLAT HP LPMODE
Set FRONT
X-OVER MODE to HP
(on input panel)
FLAT HP LPMODE
Set...

6
INSTALLATION AND SETUP
SETTING THE 
OUTPUT MODE
Setting an output mode depends on
your choice of system configuration
and the nominal impedace of your
speaker system. JBL Power Series BPx
amplifiers provide rated power into 
any impedance between 1 and 4 ohms.
The BPx500.1, BPx1100.1 and BPx2200.1
amplifiers can be configured to provide
high voltage to loads of 2 ohms or
greater, or high current for loads below
2 ohms. 
Using the Bridge Mode If your speaker system has a nominal
impedance of 2 ohms or...

7
INSTALLATION AND SETUP
For sealed enclosures, use DBO to
enhance the middle of the bass region.
Set the HP FREQ control to 35Hz to
40Hz and adjust the BOOST control to
taste. This will make the bass sound
bigger and fuller. Alternatively, for
tighter-sounding bass, set the HP FREQ
control between 45Hz and 50Hz, 
and also adjust the BOOST control
according to your preference.
For infinite-baffle applications, set the
HP FREQ control to the speaker’s F
Svalue (to keep the subwoofer from 
trying to create...

Px300.4 Px600.2 BPx500.1 BPx1100.1 BPx2200.1
Power Output,  75W x 4 150W x 2 N/A N/A N/A4 Ohms
Power Output,  150W x 4 300W x 2 250W x 2 575W x 2 1100W x 2
2 Ohms
Power Output,  300W x 2 600W x 1 500W x 1 1100W x 1 2200W x 1
Bridged, 4 Ohms
Power Output, N/A N/A 500W x 1 1100W x 1 2200W x 1
Parallel, 1 Ohm
Min. Speaker 2 ohms 2 ohms 1 ohm 1 ohm 1 ohm
Impedance
Frequency  11Hz ~ 45kHz, +
1dB 10Hz ~ 45kHz, +1dB 20Hz ~ 320Hz , – 3dB 20Hz ~ 320Hz , – 3dB 20Hz ~ 320Hz , – 3dBResponse
Input Sensitivity 250mV ~...