™
D E C A D E
A M P L I F I E R S D A 4 0 0 2 , D A 6 5 0 2 , D A 3 5 0 4 , D A 1 0 0 2
GENUINE JBL
6
6
8
9
9
7
1
8
2
SPEAKER INPUT
INPUT SPEAKER
MODE
INPUT
INPUT
MODE
LINE INPUT
INPUT
LEVEL
BASS
EQ
CROSS
OVER
CROSS
OVER
BASS
EQ
INPUT
LEVEL
LINE INPUT
+
L
–
+
R
–
–
L
+
R
–
SPEAKER INPUT LINE INPUT
INPUT
LEVEL
BASS EQ
CROSSOVER
R
L
R
L
–
L
L
+
–
R
R
+
–
MONO
STEREO
STEREO
MONO
R
L
+
+
OFF 6dB LPF HPF
LPF HPF OFF 6dB
FLAT
1
10
1
10
FLAT
+
OFF 6dB
LPF FLAT HPF
1
10
2
1
2
1
7
7
5
4
5
3
3
4
–
–
BRIDGED
+
REM GND(–) BATT(+)
FUSE
REAR
BRIDGED
FRONT
BRIDGED
POWER
FUE
–
–
+
–
–
+
+
LEFT
–
RIGHT +
+
LEFT
–
RIGHT +
REM GND(–) BATT(+)
30 AMP
20 AMP
+
LEFT
–
RIGHT +
SPEAKER OUTPUT
POWER
SPEAKER OUTPUT
DA4002/DA6502
DA3504
7
2
8
1
9
Controls and Connectors
1. Pre-amp Line Level Input Connector –
Connects to line-level output from the
source unit.
2.Floating Ground Factory-Head-Unit
Interface Speaker Input – Connects to
speaker level output from the source
unit (2-channel on DA4002, DA6502,
DA1002; 2 separate 2-channel connec-
tors on DA3504).
3.Speaker-Output Connector – 2-channel
on DA4002, DA6502 and DA1002; 4-
channel on DA3504.
4.Fuse – DA4002: 15A ATC,
DA6502: 20A ATC, DA1002 2x 20A ATC,
DA3504: 30A ATC.
5.Power Connector – Connection for
12V+, Gnd and Rem in.
6.Input-Mode Switch – Sums left and
right inputs.
SPER INPUT LINE INPUT
INPUT LEVEL
BASS
LOW PA
FILTE
L
L
+
–
R
R
+
–
R
+
OFF 6dB
OFF 70Hz 100Hz
1
10
+
+
L
L
R
–
–
7. Input-Level Control – Adjusts input sen-
sitivity for pre-amp level and speaker
level inputs.
8.Crossover Selector – Determines
whether the crossover is a High-Pass
filter @120Hz (HP), a Low-Pass filter
@120Hz (LP) or unfiltered (FLAT). Low-
pass filter frequency selector (DA1002).
9.Bass E.Q. – Enables bass boost +6dB
@ 50Hz.
5
3
4
20 AMP
SPEAKR OUTPUT
POWER
FUSE
20 AMP AMP
–
BRIDGED
+
+
+
–
REGND(–) BATT(+)
LEFT
RIGHT
DA1002
3
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 inTri-Mode
(stereo and mono simultaneously to
one or two pairs of satellite speakers
and a subwoofer), refer to the chart
below 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
system doesn’t drop below 2 ohms.
FREQUENCY INDUCTOR CAPACITOR
Crossover 6dB/oct. LP 6dB/oct. HP
(4 ohm)
(4 ohm)
Mounting the Amplifier
75Hz
8.0mH
6.4mH
5.0mH
4.2mH
3.6mH
3.2mH
530µF
400µF
318µF
265µF
227µF
198µF
The JBL Decade Series amplifiers 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.
100Hz
125Hz
150Hz
175Hz
200Hz
2. Locate the 3-connection barrier strip
labeled +Batt, Rem and Gnd. Connect a
black wire (at least 12G for DA4002,
10G for DA6502, DA1002 and DA3504)
to the Gnd terminal and connect the
other end to the nearest bare-metal
chassis component.Then, connect a
red wire (at least 12G for DA4002, 10G
for DA6502, DA1002 and DA3504) from
the vehicle’s +12-volt battery terminal
to the +Batt terminal on the barrier
strip. Finally connect a blue wire (16G)
to the Rem terminal on the barrier strip
and connect the other end to the Rem
output of the source unit.
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 input plug on
the amp using the connector provided.
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.
4
Observe the following color-codes:
Left+: White
Left–: White with black stripe
Initially, turn the input sensitivity GAIN
control to its minimum (counter-clock-
wise) position.
Right+: Gray
At some point, you’ll hear distortion
on the music peaks. Stop the adjust-
ment and turn it back slightly.This is
the maximum undistorted output level
of your system, and should not be
exceeded during use.
3.After adjusting the level of the main
speakers in your system, you should
adjust the remaining channels (if you
are using a DA3504 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 too complex
to adjust.Your local JBL installation
specialist is the best person to help
with such adjustments.
Right–: Gray with black stripe
4. If you are connecting your Decade
Series amplifier to a source unit with
output voltage higher than 4V, connect
the output signal wires of the source
unit to the floating ground factory head
unit inputs. Because the inputs have an
impedance of 100K ohms, this connec-
tion will provide the best noise-free
performance possible.
1. Reconnect the (–) negative lead to
your vehicle’s battery. Apply power to
the audio system and play a favorite
music track from a CD or tape. (Note:
After the source unit is on, the JBL
badge (on the top panel) will illumi-
nate, indicating the amplifier is on. If
not, check the wiring, especially the
remote connection from the source
unit. Also refer to “Troubleshooting”
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.
Setting Input Sensitivity
Proper input sensitivity control settings
on Decade Series power 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, equal-
izers and other processors) should be set
as high as possible with the amplifier
input sensitivity set as low as possible
while still providing adequate volume lev-
els. Using a high signal level and a low
sensitivity setting will help keep back-
ground noise in the system to a
System Setup and Adjustment
Electronic Crossover
The electronic crossover(s) in your
Decade Series amplifier can be selected
as a 12dB/oct. high-pass filter at 120Hz
(HPF), a 12dB/oct. low-pass filter at 80Hz
(LPF) or it can be defeated (FLAT).
minimum.
5
Figure 1
SPEAKER INPUT LINE INPUT
INPUT
LEVEL
BASS EQ
CROSSOVER
–
–
BRIDGED
+
+
REM GND(–) BATT(+)
FUSE
L
L
+
–
R
R
+
–
R
L
15 AMP
+
OFF 6dB
LPF FLAT HPF
1
10
+
LEFT
–
RIGHT
SPEAKER OUTPUT
POWER
Figure 2
Applications
For your convenience, we’ve included
several application diagrams to help you
plan your own system installation.
Figures 1 through 4 show how to config-
ure the Decade Series power amplifiers
for stereo, bridged-mono and tri-mode
operation.
20 AMP
SPEAKER OUTPUT
POWER
FUSE
20 AMP 20 AMP
–
BRIDGED
RIGHT
+
+
SPEAKER INPUT LINE INPUT
INPUT LEVEL
BASS EQ
LOW PASS
FILTER
+
LEFT
–
–
REM GND(–) BATT(+)
L
L
+
–
R
R
+
–
R
L
+
OFF 6dB
OFF 70Hz 100Hz
1
10
+
+
L
R
–
–
Figure 3
(Note: For simplicity, figures do not
show power, remote and input connec-
tions.)
Figure 1.This wiring diagram shows a
DA4002, DA6502 amplifier set to stereo
to drive a pair of full-range speakers.
Figure 2.This wiring diagram shows a
DA1002 amplifier set to bridge mode
(mono) to drive a single subwoofer.
Figure 3.This wiring diagram shows a
DA4002, DA6502 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.
SPEAKER INPUT LINE INPUT
INPUT
LEVEL
BASS EQ
CROSS OVER
–
–
BRIDGED
+
REM GND(–) BATT(+)
FUSE
L
L
+
–
R
R
+
–
R
+
OFF 6dB
LPF FLAT HPF
20 AMP
1
10
+
LEFT
–
RIGHT +
L
SPEAKER OUTPUT
POWER
Figure 4
Figure 4.This wiring diagram shows a
DA3504 set to drive a pair of 5-1/4"
2-way speakers with the two front
channels, and the rear channels set
to drive a single subwoofer in bridge
mode.
REAR
BRIDGED
RIGHT +
FRONT
BRIDGED
POWER
FUSE
SPEAKER INPUT
INPUT MODE
INPUT SPEAKER
MODE
INPUT
–
–
+
–
–
+
LINE INPUT
INPUT
LEVEL
BASS
EQ
CROSS
OVER
CROSS
OVER
BASS
EQ
INPUT
LEVEL
LINE INPUT
R
+
LEFT
–
+
LEFT
–
RIGHT +
REM GND(–) BATT(+)
30 AMP
+
+
R
–
–
L
–
+
R
–
L
R
L
–
MONO
STEREO
STEREO
MONO
+
+
OFF 6dB LPF HPF
10
LPF HPF OFF 6dB
FLAT
1
1
10
FLAT
L
SPEAKER OUTPUT
6
Troubleshooting
Use the following guide to identify
symptoms and solve problems. Make
sure the vehicle’s electrical system is
working properly and power is reaching
the amplifier’s power connector.
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
Audio lacks “punch”
Speakers are wired with
wrong polarity
Check polarity of connections; refer to Applications
declare in own responsibility, that the products described
in this owner’s manual are in compliance with technical
standard:
Audio cycles off and on;
amber protection LED
(JBL badge on top panel)
is not lit
A protection circuit is turning
amplifier off and on
Verify the following: off electrical system is between
5 ~ 18 Vdc; temperature is not over 194°F (90°C);
no short circuits; speaker loads are not less than 2 ohms
(4 ohms in mono)
EN 55 020/6.1988
Audio cycles off and on;
GAIN is set too high
Set Input Sensitivity correctly (see page 5)
amber protection LED
(JBL badge on top panel) is not lit
Steen Michaelsen
JBL Europe A/S
Birkerød. DENMARK. 3/98
Fuse blows
Incorrect wiring or
short circuit
Check connections; refer to Applications
7
Specifications
DA4002, DA6502, DA1002, DA3504
Specifications
DA4002
DA6502
DA3504
DA1002
Power Output, 4 ohms:
Power Output, 2 ohms:
2 x 40 watts
2 x 50 watts
2 x 65 watts
2 x 75 watts
150 watts
4 x 35 watts
4 x 50 watts
2 x 100 watts
2 Hz ~ 20kHz +1dB, –2dB
250 mV ~ 4V
0.1 %
2 x 100 watts
2 x 150 watts
300 watts
Power Output, Bridged 4 ohms: 100 watts
Frequency Response:
Input Sensitivity:
20Hz ~ 20kHz +1dB, –2d
20Hz ~ 20kHz +1dB, –2dB
250 mV ~ 4V
0.1 %
20Hz ~ 20kHz +1dB, –2dB
250 mV ~ 4V
0.1 %
250 mV ~ 4V
0.1 %
THD + Noise (4 ohms):
Signal-to-Noise:
>90dB
>90dB
>90dB
>90dB
Maximum Current Draw:
Dimensions (W x H x L):
18A
14A
34A
32A
9-5/8" x 2-1/4" x 8-1/4"
244 x 57 x 210mm
9-5/8" x 2-1/4" x 9-3/4"
244 x 57 x 248mm
11-5/8" x 2-9/16" x 11-7/8"
295 x 65 x 300mm
11-5/8" x 2-9/16" x 11-5/16"
295 x 65 x 290mm
JBL Consumer Products
250 Crossways Park Drive
Woodbury, NY 11797
Part No. DECAMPOM
Made in Korea
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