JBL Stereo Amplifier P 4020 User Manual

Power Series Amplifiers  
P-4020, P-4040 Owner’s Manual  
GENUINE JBL  
 
P-4020  
P-4040  
MADE IN THE U.S.A.  
MADE IN THE U.S.A.  
SPEAKER OUTPUTS  
SPEAKER OUTPUTS  
BRIDGE  
BRIDGE  
+  
POWER  
REM  
FUSE  
POWER  
REM  
FRONT  
F
U
S
E
L
R
+
+BATT  
GND  
L
+
R
+
20A  
+BATT  
GND  
3
0
A
REAR  
B
D
G
E
4
6
6
5
4
5
Always wear protective eyewear when  
using tools.  
When routing cables, keep input signal  
cables away from power cables and  
speaker wires.  
SPKR LEVEL IN  
REAR  
LINE LEVEL  
INPUT  
LINE LEVEL  
INPUT  
AUX  
OUT  
AUX  
OUT  
SPEAKER LEVEL IN  
+
R
L
+
FRONT  
REAR  
+
R
+
L
L
R
L
L
L
+
R
L
+
ONT  
R
R
R
When making connections, make sure  
that each connection is clean, insulated  
and properly secured. Observe the  
polarity markings on the rear panel.  
Refer to the application drawings to set  
up the amplifier for operation in stereo,  
bridged-mono, bi-amp or tri-mode con-  
figurations.  
2
3
3
1
1
2
8
9
11  
10  
FRONT  
REAR  
PRE OUT  
F+R EAR FRT  
FLAT LP LP  
2V  
2V  
2V  
INUT  
FRT REAR  
INPUT MODE  
MO ST  
XOVER  
XOVER  
INPUT MODE  
ST MO  
INPUT MODE  
MO ST  
XOVER  
LP HP FLAT  
LP HP FLAT  
FLAT HP LP  
If the amplifiers fuse must be replaced,  
use only the same rating and type as a  
replacement. Do not substitute another  
kind.  
4V  
.250V  
4V  
.250V  
LEL  
LEL  
4V  
.250V  
LEVEL  
11  
11  
7
7
7
8
8
Controls and Connectors  
1. Pre-amp Level Input Connector –  
Connects to line-level output from the  
source unit.  
2. Universal Interface Speaker-Level  
Connector – Connects to speaker-level  
output from the source unit. Provides  
Common Sense amplifier turn-on  
when used with factory radios  
(2-channel on P-4020, 4-channel on  
P-4040).  
3. Pre-amp Level Output Connector –  
Connects to other amps or processors  
in the signal chain (flat on P-4020, flat  
or filtered on P-4040).  
4. Speaker-Output Connector – (2-chan-  
nel on P-4020, 4-channel on P-4040).  
5. Fuses P-4020: 20A ATC type, P-4040:  
30A ATC type.  
7. Input-Mode Switch – Sums left and  
right inputs.  
8. Input-Sensitivity Control – Adjusts  
input sensitivity for pre-amp level and  
speaker-level inputs.  
9. Pre-amp Output Selector Switch –  
Selects input path for pre-amp output.  
Output can be summed from front and  
rear inputs with no filter, or filtered by  
the front or rear crossover.  
10. Rear-Channel Input Selector – Selects  
rear-channel input between front input  
and rear input.  
11. Crossover Selector – Determines  
whether the crossover is a High-Pass  
filter (HP), a Low-Pass filter (LP) or  
unfiltered (Flat).  
6. Power Connector – Connection for  
12V+, Gnd and Rem.  
3
 
2. Locate the 3-connection barrier strip  
labeled +Batt, Rem and Gnd. Connect a  
black wire (at least 12G) to the Gnd ter-  
minal and connect the other end to the  
nearest bare-metal chassis component.  
Then, connect a red wire (at least 12G)  
from the vehicles +12-volt battery ter-  
minal to the +Batt terminal on the bar-  
rier strip. Finally, connect a blue wire  
(16G) to the Rem terminal on the bar-  
rier strip and connect the other end to  
the Rem output of the source unit. (If  
you are using speaker-level inputs and  
speaker-level outputs from the source,  
disregard the previous instruction  
FREQUENCY INDUCTOR CAPACITOR  
Crossover 6dB/oct. LP 6dB/oct. HP  
2. If you are connecting the amplifier to  
a factory-installed source unit, or to a  
source unit that only has speaker-level  
outputs, connect the speaker outputs  
of the source to the speaker inputs on  
the amp, observing the following color  
codes:  
Front Left+: White  
Front Left–: White with black stripe  
Front Right+: Gray  
(4 ohm)  
(4 ohm)  
75Hz  
100Hz  
125Hz  
150Hz  
175Hz  
200Hz  
8.0mH  
6.4mH  
5.0mH  
4.2mH  
3.6mH  
3.2mH  
530µF  
400µF  
318µF  
265µF  
227µF  
198µF  
Mounting the Amplifier  
Front Right–: Gray with black stripe  
Rear Left+: Green  
Rear Left–: Green with black stripe  
Rear Right+: Purple  
The JBL P-4020 (or P-4040) can be  
mounted in virtually any location inside  
the vehicle. However, make sure to keep  
the amplifier away from heater vents or  
ducts.  
1. At the chosen site, use the amplifier as  
a mounting template and mark the  
locations of the four mounting holes.  
2. Drill a small pilot hole at each marked  
location.  
3. If you are running the amp in tri-mode  
(stereo and mono simultaneously to  
one or two pairs of satellite speakers  
and a subwoofer), refer to the chart  
above to determine the capacitor and  
inductor values you’ll need to route  
bass signals to the woofer, and  
midrange and high frequencies to the  
satellite speakers.These passive  
crossover components will also ensure  
that the impedance of the speaker sys-  
tem doesn’t drop below 2 ohms.  
(Fig. 7)  
regarding the Rem terminal.)  
Rear Right–: Purple with black stripe  
(Note: When using the Universal  
Interface speaker-level inputs and line-  
level outputs, the Rem terminal on the  
amplifier may be used as a remote out-  
put connection, and will provide power  
to turn on other amplifiers and proces-  
sors in the system.)  
3. If you are connecting your Power  
Series amplifier to a source unit with  
output voltage higher than 4V, connect  
the output-signal wires of the source  
unit to the Universal Interface speaker  
inputs. Because the inputs have an  
impedance of 10K ohms, this connec-  
tion will provide the best noise-free  
performance possible.  
Wiring the Speaker Output  
Connections  
1. Connect the speakers, observing  
proper polarity, to the speaker output  
barrier strip on the amplifier using at  
least 16G high-quality speaker wire.  
(Note: The total impedance of the  
speakers connected to the outputs,  
when the amp is driven in stereo,  
must be at least 2 ohms.)  
2. If you are bridging the amplifier, con-  
nect the speaker wires to the terminals  
marked “bridge,” observing proper  
polarity. (Note: The total impedance of  
the speaker system to be connected to  
the amplifier must be at least 4 ohms  
in bridge mode.)  
3. Mount the amplifier and securely  
tighten the mounting screws.  
Wiring the Power Connections  
Refer to diagrams on page 3 for connec-  
tor locations.  
1. For power, remote and speaker wires,  
strip 1⁄4" off one end of each jacket to  
reveal bare wire for insertion into the  
barrier strip connectors.  
Wiring the Input Connections  
1. If you are using conventional RCA  
input connections and a source unit  
with output voltage less than 4V, sim-  
ply plug the RCA plugs into the RCA  
jacks on the amplifier.  
4
 
3. After adjusting the level of the main  
speakers in your system, you should  
adjust the remaining channels (if you  
are using a P-4040 or a multi-amp  
system) for the desired system bal-  
ance.You’ll find this easiest to do by  
adjusting the channels in the following  
order: 1) front speakers, 2) rear speak-  
ers, 3) subwoofer. Elaborate, multi-  
channel systems may be complex to  
adjust.Your local JBL installation spe-  
cialist is the best person to help with  
such an adjustment.  
From  
Source  
Unit  
IN4001 Diode  
To  
Amp  
System Setup and Adjustment  
Electronic Crossover  
The electronic crossover in the P-4020 and  
P-4040 should be used to route the appro-  
priate signal to speakers intended to play  
only bass, or only midrange and treble fre-  
quencies.The crossover slope is 12dB/oct  
and the frequency is fixed at 80Hz.  
Pre-amp Outputs  
Connect these to the input connectors of  
other amplifiers or processors in your  
system. Refer to the Applications” sec-  
tion for system expansion possibilities.  
Setting Input Sensitivity  
Proper input-sensitivity control settings  
on Power Series amplifiers are critical to  
ensure optimum performance, low noise  
levels and maximum system reliability.  
As a general rule, controls at the front  
end of a system (source, equalizers and  
other processors) should be set as high  
as possible with the amplifier input sensi-  
tivity set as low as possible while still  
providing adequate volume levels. Using  
a high signal level and a low-sensitivity  
setting will help keep background noise  
in the system to a minimum.  
4. In some systems it may be desirable  
to have two sources play simultane-  
ously through the audio system. For  
instance, if you have a factory-installed  
radio in your car and you want to add  
an aftermarket CD player, you may  
connect the CD player to the RCA  
inputs of the amp and the factory radio  
to the Universal Interface speaker  
inputs. (Note: Front and rear channels  
of the CD and radio must be driven  
into the front and rear inputs of the  
amplifier. UseY adapters if necessary.)  
The Universal Interface circuitry will  
isolate the two signals from each other  
while allowing them to drive the amp  
simultaneously.Therefore, switching  
from one source to the other is as sim-  
ple as turning the unused source off,  
and the other on. (Note: you must con-  
nect the remote turn-on wire from the  
CD player to the Rem terminal on the  
amp. Install a diode in the remote line  
from the CD player as shown in the  
diagram above.)  
1. Reconnect the (–) negative lead to your  
vehicles battery. Apply power to the  
audio system and play a favorite music  
track from CD or tape. (Note: After the  
source unit is on, the JBL badge (on the  
top panel) will illuminate, indicating the  
amplifier is on. If not, check the wiring,  
especially the remote connection from  
the source unit. Also refer to “Trouble-  
shooting” on page 7.)  
2. On the source unit, increase the volume  
control until it is approximately 3/4 of  
its maximum output level. Slowly  
increase the Input Sensitivity control  
(clockwise) toward three o’clock and,  
at the same time, listen to the quality  
of the reproduced sound. At some  
point, you’ll hear distortion on the  
music peaks. Stop the adjustment and  
turn it back slightly.This is the maxi-  
mum undistorted output level of your  
system, and it should not be exceeded  
during use.  
Applications  
For your convenience, we’ve included  
several application diagrams to help you  
plan your own system installation.  
Figures 1 through 3 show how to config-  
ure the JBL P-4020 or P-4040 for stereo,  
bridged-mono and tri-mode operation.  
For system expansion ideas, see Figures  
4 and 5 on the next page. (Note: For sim-  
plicity, Figures 1 through 5 do not show  
power, remote and input connections.)  
Many different system configurations are  
possible using the crossovers and pre-  
amp outputs featured in Power Series  
amplifiers. If you are considering expand-  
ing your system beyond what is shown  
here, please consult your local JBL instal-  
lation specialist, who is experienced in  
designing complex mobile-audio systems.  
Initially, turn the input sensitivity GAIN  
control to its minimum (counterclock-  
wise) position.  
5
 
MADE IN THE U.S.A.  
SPEAKER OUTPUTS  
Figure 4. In this example system,  
the front channels of a P-4040  
drive a pair of 5-1/4" 2-way speak-  
ers, and the rear channels are  
bridged to drive a single 12"  
woofer.  
BRIDGE  
+  
POWER  
REM  
Figure 1.This wiring diagram shows  
a JBL P-4020 amplifier set to stereo  
to drive a pair of full-range speakers.  
FUSE  
20A  
L
R
+
+BATT  
GND  
MADE IN THE U.S.A.  
SPEAKER OUTPUTS  
BRIDGE  
POWER  
REM  
FRONT  
F
U
S
E
L
+
R
+
+BATT  
GND  
3
0
A
REAR  
B
R
I
D
G
E
2V  
INPUT MODE  
MO ST  
XOVER  
LP HP FLAT  
FRONT  
PRE OUT  
F+R REAR FRT  
FLAT LP LP  
REAR  
2V  
2V  
INPUT  
FRT REAR  
4V  
.250V  
INPUT MODE  
MO ST  
XOVER  
XOVER  
INPUT MODE  
ST MO  
LEVEL  
LP HP FLAT  
FLAT HP LP  
4V  
.250V  
4V  
.250V  
LEVEL  
LEVEL  
MADE IN THE U.S.A.  
SPEAKER OUTPUTS  
BRIDGE  
+  
Figure 2.This wiring dia-  
gram shows a JBL P-4020  
amplifier set to bridge  
mode (mono) to drive a  
single subwoofer.  
MADE IN THE U.S.A.  
POWER  
REM  
FUSE  
20A  
L
R
+
+BATT  
GND  
SPEAKER OUTPUTS  
BRIDGE  
+  
POWER  
REM  
FUSE  
20A  
L
R
+
+BATT  
GND  
SPKR LEVEL IN  
REAR  
LINE LEVEL  
INPUT  
AUX  
OUT  
FRONT  
REAR  
+
R
L
+
L
L
+
R
L
+
FRONT  
R
R
2V  
INPUT MODE  
MO ST  
XOVER  
LP HP FLAT  
LINE LEVEL  
INPUT  
AUX  
OUT  
SPEAKER LEVEL IN  
2V  
+
R
+
L
4V  
.250V  
LEVEL  
INPUT MODE  
MO ST  
XOVER  
LP HP FLAT  
L
R
L
R
4V  
.250V  
LEVEL  
MADE IN THE U.S.A.  
SPEAKER OUTPUTS  
BRIDGE  
POWER  
REM  
FRONT  
F
U
S
E
L
+
R
+
+BATT  
GND  
3
0
A
MADE IN THE U.S.A.  
SPEAKER OUTPUTS  
BRIDGE  
+  
POWER  
REM  
FUSE  
20A  
L
R
+
+BATT  
GND  
REAR  
B
R
I
D
G
E
Figure 3.This wiring diagram  
shows a JBL P-4020 amplifier set  
for tri-mode operation. For a  
desired crossover frequency, use  
the chart on page 4 to select an  
inductor for the subwoofer, and  
corresponding capacitors for left  
and right speakers.  
FRONT  
REAR  
XOVER  
FLAT HP LP  
PRE OUT  
F+R REAR FRT  
FLAT LP LP  
2V  
2V  
INPUT MODE  
MO ST  
XOVER  
INPUT MODE  
ST MO  
INPUT  
FRT REAR  
LP HP FLAT  
4V  
.250V  
4V  
.250V  
LEVEL  
LEVEL  
2V  
INPUT MODE  
MO ST  
XOVER  
LP HP FLAT  
Figure 5. In this expanded system, a JBL P-4040 drives two pairs of 6-1/2" 2-way speakers.  
The JBL P-4040s pre-amp outputs feed a JBL P-4020 to drive a single 12" subwoofer in  
bridge mode.  
4V  
.250V  
LEVEL  
6
 
Troubleshooting  
Use the following guide to identify  
symptoms and solve problems. Make  
sure the vehicles electrical system is  
working properly and power is reaching  
the JBL P-4020 (or P-4040).  
Declaration of Conformity  
Symptom  
Likely Cause  
Solution  
No audio  
Low/no remote on voltage  
Check connections; turn-test turn-on voltage  
Speakers are not connected or are blown  
Check wiring; use VOM/DVM to measure speaker-coil  
resistance  
We, JBL Europe A/S  
Kongevejen 194B  
DK-3460 Birkerød  
DENMARK  
Distorted audio  
Input sensitivity is not set properly  
See Setting Input Sensitivity on page 5  
declare in own responsibility, that the products described  
in this owner’s manual are in compliance with technical  
standards:  
Audio lacks “punch”  
Speakers are wired with wrong polarity  
Check polarity of connections; refer to Applications  
Audio cycles off and on;  
amber protection LED  
(JBL badge on top panel)  
is flashing  
A protection circuit is turning the  
amplifier off and on  
Verify the following: off electrical system is  
between 5 ~ 18Vdc; temperature is not  
over 194°F (90°C); there are no short circuits; speaker  
loads are not less than 2 ohms (4 ohms in mono)  
EN 55013/A12/8.1994  
EN 55020/12.1994  
Audio cycles off and on;  
amber protection LED  
(on top panel) is flashing  
GAIN is set too high  
Set Input Sensitivity  
correctly (see page 5)  
Steen Michaelsen  
JBL Europe A/S  
Birkerød. DENMARK. 3/98  
Fuse blows  
Incorrect wiring or short circuit  
Check connections; refer to Applications  
7
 
Specifications  
P-4020, P-4040  
Specifications  
JBL P-4020  
2 x 40 watts  
2 x 50 watts  
JBL P-4040  
4 x 40 watts  
4 x 50 watts  
100 watts x 2  
20Hz ~ 20kHz +0dB, –1dB  
250mV ~ 4V  
0.05 %  
Power Output, 4 ohms:  
Power Output, 2 ohms:  
Power Output, Bridged 4 ohms: 100 watts  
Frequency Response:  
Input Sensitivity:  
20Hz ~ 20kHz +0dB, –1dB  
250mV ~ 4V  
0.05 %  
THD + Noise (4 ohms):  
Signal-to-Noise:  
>100dB  
18A  
>100dB  
Maximum Current Draw:  
Dimensions (W x H x L):  
40A  
7-5/8" x 2-1/4" x 8-3/4"  
194 x 58 x 223mm  
13-5/8" x 2-1/4" x 8-3/4"  
347 x 58 x 223mm  
JBL Consumer Products  
250 Crossways Park Drive  
Woodbury, NY 11797  
Part No. SH1122  
Made in USA  
 

Jasco Camcorder HO98756 User Manual
JBL Car Speaker GTO17T User Manual
Jenn Air Dishwasher JDB1090AWB User Manual
John Lewis Clothes Dryer JLTDC10 User Manual
JVC Car Video System LVT1484 001B User Manual
JVC Flat Panel Television PD 42WV74 User Manual
JVC Headphones HA NC80 C User Manual
Kalorik Mixer USK HM 32594 User Manual
Kettler Bicycle KT902 182 User Manual
KitchenAid Cell Phone KGRS807S User Manual