P 4040 (serv.man8) — JBL Car Audio User Guide / Operation Manual

Model
P 4040 (serv.man8)
Pages
8
Size
916.77 KB
Type
PDF
Document
User Guide / Operation Manual
Brand
Device
Car Audio
File
p-4040-sm8.pdf
Date

View JBL P 4040 (serv.man8) User Guide / Operation Manual online

Power Series Amplifiers
P-4020, P-4040 Owner ’s Manual
G E N U I N E   J B L
P-4020/4040 OM.  7/14/98 11:42 AM  Page 1
2
Amplifier Features
• 4-, 3- or 2-channel operation (P-4040)
2- or 1-channel operation (P-4020)
• Simultaneous stereo and mono
operation
• Built-in 12dB/oct electronic crossover
• Balanced differential input 
• Pre-amp outputs (filtered on P-4040)
• Oversized Floating Rail Mosfet Power
Supply
• Universal Interface
• Common Sense turn-on
• Variable input sensitivity (250mV–4V)
• Fully complementary, direct coupled
discrete power amplifier circuitry
• Gold-plated power, input and output
connectors
• 2-Ohm stable (stereo)
• JBL badge lights when amp is operat-
ing and flashes when protection circuit
is activated
• Made in USA
About This  Manual
To attain maximum amplifier perfor-
mance, we encourage you to read the
remaining pages before installing and
operating your new JBL Power Series
amplifier. Especially review the
Applications section for ideas on design-
ing and expanding your system. Also,
save these instructions for future refer-
ence. Important: Installation of automo-
tive stereo components can require
extensive experience in performing a
variety of electrical and mechanical pro-
cedures. Although these instructions
explain how to install a JBL Power Series
amplifier in a general sense, they do not
show the exact installation methods for
your particular vehicle. If you do not
have the experience necessary, do not
attempt the installation yourself; instead
ask your Authorized JBL Car-Audio Dealer
about professional installation options.
Installation Precautions and Notes
• The JBL P-4020 (or P-4040) has five
levels of circuit protection that monitor
the amplifier and will shut it down if
the electrical system voltage drops
below 5Vdc or exceeds 18Vdc, temper-
atures are above 194° F (90° C), short
circuits occur, or current draw exceeds
product specifications. For best perfor-
mance, check the intended mounting
site to make sure the operating envi-
ronment does not create conditions
that will trigger the protection circuit.
• Prior to installation, turn off all audio
systems and other electrical devices.
Also disconnect the (–) negative lead
from the vehicle’s battery.
• At the installation site, locate and make
a note of all fuel lines, hydraulic brake
lines and electrical wiring. Use extreme
caution when cutting or drilling in and
around these areas.
• Check clearances on both sides of a
planned mounting surface before
drilling any holes or installing any
screws. Remember that mounting
screws can extend behind the mount-
ing surface. 
Thank you
for purchasing your new
JBL Power Series™ amplifier. Power
Series amplifiers feature the latest
advances in discrete-circuit topology,
ensuring low distortion and superbly
clean and clear sound quality. In addition
to RCA-type pre-amp inputs, Power
Series amplifiers feature Universal
Interface™, designed to facilitate integra-
tion with factory-installed audio systems
for distortion-free performance that rivals
conventional pre-amp connections.
Included in the Universal Interface circuit
is Common Sense™ turn-on. Common
Sense turn-on senses the common-mode
voltage present on the speaker outputs of
factory and aftermarket radios, turning on
the amplifier without a separate remote
wire. All Power Series amplifiers feature
built-in electronic crossovers and pre-amp
outputs for easy system expansion with-
out requiring outboard processors.
P-4020/4040 OM.  7/14/98 11:42 AM  Page 2
3
• Always wear protective eyewear when
using tools. 
• When routing cables, keep input signal
cables away from power cables and
speaker wires. 
• 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.
• If the amplifier’s fuse must be replaced,
use only the same rating and type as a
replacement. Do not substitute another
kind.
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.
6.  Power Connector – Connection for
12V +, Gnd and Rem.
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).
LEVEL
INPUT MODE
MO ST
4V
.250V
XOVER
FLAT
HP
LP
2V
20
 
 
 
R
 
 
 
+
 
 
 
L
 
 
 
+
+BATT
REM
GND
BRIDGE 
SPEAKER OUTPUTS
POWER
FUSE
20A
MADE IN THE U.S.A.
R
L
LINE LEVEL
INPUT
SPEAKER LEVEL IN
R
+
L
+
AUX
OUT
R
L
+ R –
+ R –
– L +
– L +
AUX
OUT
R
L
R
L
FRONT
FRONT
REAR
LINE LEVEL
INPUT
SPKR LEVEL IN
REAR
ST MO
INPUT MODE
PRE OUT
LEVEL
INPUT MODE
MO ST
4V
.250V
FRONT 
F+R
FLAT
REAR
LP
FRT
LP
FRT
REAR
XOVER
FLAT HP LP
XOVER
FLAT
HP
LP
LEVEL
4V
.250V
2V
2V
REAR 
INPUT
F U S E
3 0 A
B R I D G E  
–       R       +
–       L       +
MADE IN THE U.S.A.
+BATT
REM
GND
BRIDGE 
SPEAKER OUTPUTS
POWER
FRONT
REAR
30
8
7
11
5
4
6
1
2
3
1
2
3
9
10
8
7
11
8
11
4
5
6
P-4020
P-4040
7
P-4020/4040 OM.  7/14/98 11:42 AM  Page 3
4
Mounting the Amplifier
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. 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.
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 vehicle’s +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
regarding the Rem terminal.)
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. 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)
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.
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
Front Right–: Gray with black stripe
Rear Left+: Green
Rear Left–: Green with black stripe
Rear Right+: Purple
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.
FREQUENCY
INDUCTOR
CAPACITOR
Crossover 
6dB/oct. LP
6dB/oct. HP
(4 ohm)
(4 ohm)
75Hz
8.0mH
530µF
100Hz
6.4mH
400µF
125Hz
5.0mH
318µF
150Hz
4.2mH
265µF
175Hz
3.6mH
227µF
200Hz
3.2mH
198µF
P-4020/4040 OM.  7/14/98 11:42 AM  Page 4
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Here you can view online or download JBL P 4040 (serv.man8) User Guide / Operation Manual in pdf. This User Guide / Operation Manual can help you recover, restore, fix, disassemble and repair JBL P 4040 (serv.man8) Car Audio. Information contained in JBL P 4040 (serv.man8) service manual (repair manual) typically includes:

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