JBL DA1002, DA6502, DA3504, DA4002 User Manual

DECADE

™

AMPLIFIERS DA4002, DA6502, DA3504, DA1002

GENUINE JBL

2

Thank you for purchasing your new

JBL Decade
Decade Series power 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,
Decade Series amplifiers feature Floating
Ground Factory-Head-Unit Interface
designed to facilitate integration with fac­tory-installed audio systems for distor­tion-free performance. All JBL Decade
Series power amplifiers feature built-in
electronic crossovers for easy system
expansion without additional outboard
processors.

™ Series power amplifier.

™,

Amplifier Features

• 4-, 3- or 2-channel operation (DA3504)
2- or 1-channel operation (DA4002,
DA6502, DA1002)

• Simultaneous stereo and mono
operation

• Built-in 12dB/oct electronic crossover

• Oversized Floating Rail Mosfet Power
Supply

• Floating Ground Factory-Head-Unit
Speaker-Level Input

• Variable input sensitivity (250mV-4V)

• Fully complementary output stage with
Class-A voltage amplification

• Gold-plated power, input and output
connectors

• 2-Ohm stable (stereo)

• Power-on indicator badge

About This Manual

To attain maximum amplifier perfor­mance, we encourage you to read the
remaining pages before installing and
operating your new JBL Decade power
amplifier. Especially review the Appli­cations section for ideas on designing
and expanding your system. Also, save
these instructions for future reference.

Important: Installation of automotive
stereo components can require extensive
experience in performing a variety of
electrical and mechanical procedures.
Although these instructions explain how
to install a JBL Decade power amplifier in
a general sense, they do not show the
exact installation methods for your partic­ular vehicle. If you do not have the expe­rience, do not attempt the installation
yourself; instead ask your Authorized JBL
Car-Audio Dealer about professional
installation options.

Installation Precautions and Notes

• The JBL Decade Power amplifiers have
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, tempera­tures are above 194° F (90° C), short cir­cuits occur or current draw exceeds
product specifications. For best perfor­mance, check the intended mounting site
to make sure the operating environment
does not create conditions that will trigger
circuit protection.

• 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 mount­ing surface.

• 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 con­figurations.

• If the amplifier’s fuse must be replaced,
use only the same rating and type as a
replacement. Do not substitute another
kind.

+

–

+

–

LEFT RIGHT

+

–

BRIDGED

SPEAKER OUTPUT

POWER

FUSE

20 AMP

REM GND(

–) BATT(+)

20

SPEAKER

INPUT

INPUT
MODE

SPEAKER

INPUT

INPUT
MODE

STEREO

MONO

L

+
–

R

+
–

LINE INPUT

R

L

110

BASS

EQ

BASS

EQ

INPUT
LEVEL

INPUT
LEVEL

CROSS
OVER

CROSS
OVER

OFF

6dB

+

OFF

6dB

+

LPF HPF

FLAT

LPF HPF

FLAT

110

LINE INPUT

R

L

STEREO

MONO

L

–
–

R

+
–

SPEAKER INPUT LINE INPUT

R

L

BASS EQ

INPUT
LEVEL

L

+
––

+

R

R

L

OFF

6dB

+

110

CROSSOVER

LPF HPFFLAT

+

–

+

–

+

–

REAR

LEFT RIGHT

+

–

+

–

LEFT RIGHT

BRIDGED

+

–

BRIDGED

SPEAKER OUTPUT

FRONT

POWER FUSE

30 AMP

REM GND(–) BATT(+)

30

1

L

L

+

+

–

–+–

R

R

R

+
–

SPEAKER INPUT LINE INPUT

R

L

110

BASS EQ

INPUT LEVEL

L

OFF

6dB

+

LOW PASS

FILTER

OFF 70Hz 100Hz

SPEAKER OUTPUT

+
+

–

–

+

–

POWER

REM GND(–) BATT(+)

BRIDGED

RIGHTLEFT

FUSE

20 AMP

20 AMP 20 AMP

20

20

2

8

9

7

6

8

6

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 connec­tors on DA3504).

3.Speaker-Output Connector – 2-channel
on DA4002, DA6502 and DA1002; 4­channel on DA3504.

4.Fuse – DA4002: 15A ATC,
DA6502: 20A ATC, DA1002 2x 20A ATC,
DA3504: 30A ATC.

3

5

DA4002/DA6502

5.Power Connector – Connection for
12V+, Gnd and Rem in.

6.Input-Mode Switch – Sums left and
right inputs.

7. Input-Level Control – Adjusts input sen­sitivity 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). Low­pass filter frequency selector (DA1002).

9.Bass E.Q. – Enables bass boost +6dB
@ 50Hz.

2

1

4

3

9

7

7

5

2

1

4

DA3504

2

3

7

1

9

5

8

4

DA100 2

3

4

Mounting the Amplifier

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.

3. Mount the amplifier and securely
tighten the mounting screws.

Wiring the Power Connections

Refer to diagrams on page 3 for connec­tor 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 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 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, con­nect 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
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

75Hz 8.0mH 530µF

100Hz 6.4mH 400µF

125Hz 5.0mH 318µF

150Hz 4.2mH 265µF

175Hz 3.6mH 227µF

200Hz 3.2mH 198µF

Wiring the Input Connections

1. If you are using conventional RCA
input connections and a source unit
with output voltage less than 4V, sim­ply 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.

(4 ohm) (4 ohm)

Observe the following color-codes:
Left+: White
Left–: White with black stripe
Right+: Gray
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 connec­tion will provide the best noise-free
performance possible.

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).

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, equal­izers 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 lev­els. Using a high signal level and a low
sensitivity setting will help keep back­ground noise in the system to a
minimum.

Initially, turn the input sensitivity GAIN
control to its minimum (counter-clock­wise) position.

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 illumi­nate, 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.

At some point, you’ll hear distortion
on the music peaks. Stop the adjust­ment 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 bal­ance. You’ll find this easiest to do by
adjusting the channels in the following
order: 1) front speakers, 2) rear speak­ers, 3) subwoofer. Elaborate, multi­channel systems may be too complex
to adjust. Your local JBL installation
specialist is the best person to help
with such adjustments.

5

SPEAKER OUTPUT

+

–

RIGHT

+

–

LEFT

+

–

POWER

REM GND(

–) BATT(+)

FUSE

BRIDGED

15 AMP

15

+

–

+

–

LEFT RIGHT

+

–

BRIDGED

SPEAKER OUTPUT

POWER

FUSE

20 AMP

REM GND(

–) BATT(+)

20

SPEAKER INPUT LINE INPUT

R

L

BASS EQ

INPUT
LEVEL

L

+
––

+

R

R

L

OFF

6dB

+

110

CROSSOVER

LPF HPFFLAT

SPEAKER OUTPUT

+
+

–

–

+

–

POWER

REM GND(

–) BATT(+)

BRIDGED

RIGHTLEFT

FUSE

20 AMP

20 AMP 20 AMP

20

20

L

L

+

+

–

–+–

R

R

R

+
–

SPEAKER INPUT LINE INPUT

R

L

110

BASS EQ

INPUT LEVEL

L

OFF

6dB

+

LOW PASS

FILTER

OFF 70Hz 100Hz

SPEAKER INPUT

L

L

L

+–+

–

R

R

R

LINE INPUT

110

BASS EQ

INPUT
LEVEL

CROSS OVER

OFF

6dB

+

LPF HPFFLAT

+

–

+

–

+

–

REAR

LEFT RIGHT

+

–

+

–

LEFT RIGHT

BRIDGED

+

–

BRIDGED

SPEAKER OUTPUT

FRONT

POWER FUSE

30 AMP

REM GND(

–) BATT(+)

30

SPEAKER

INPUT

INPUT
MODE

SPEAKER

INPUT

INPUT
MODE

STEREO

MONO

L

+
–

R

+
–

LINE INPUT

R

L

110

BASS

EQ

BASS

EQ

INPUT
LEVEL

INPUT
LEVEL

CROSS

OVER

CROSS
OVER

OFF

6dB

+

OFF

6dB

+

LPF HPF

FLAT

LPF HPF

FLAT

110

LINE INPUT

R

L

STEREO

MONO

L

–
–

R

+
–

Figure 1

6

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 config­ure the Decade Series power amplifiers
for stereo, bridged-mono and tri-mode
operation.

(Note: For simplicity, figures do not
show power, remote and input connec­tions.)
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 tri­mode 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.
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.

Figure 2

Figure 3

Figure 4

Declaration of Conformity

We, JBL Europe A/S

Kongevejen 194B
DK-3460 Birkerød
DENMARK

declare in own responsibility, that the products described
in this owner’s manual are in compliance with technical
standard:
EN 55 020/6.1988

Steen Michaelsen

JBL Europe A/S

Birkerød. DENMARK. 3/98

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.

Symptom Likely Cause Solution

No audio Low/no remote on voltage Check connections; turn-test turn-on voltage

Distorted audio Input sensitivity is not set properly See Setting Input Sensitivity on page 5

Audio lacks “punch” Speakers are wired with Check polarity of connections; refer to Applications

Audio cycles off and on; A protection circuit is turning Verify the following: off electrical system is between
amber protection LED amplifier off and on 5 ~ 18 Vdc; temperature is not over 194°F (90°C);
(JBL badge on top panel) no short circuits; speaker loads are not less than 2 ohms
is not lit (4 ohms in mono)

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

Fuse blows Incorrect wiring or Check connections; refer to Applications

Speakers are not connected Check wiring; use VOM/DVM to measure speaker coil
or are blown resistance

wrong polarity

short circuit

7

Specifications

DA4002, DA6502, DA1002, DA3504

Specifications DA40 02 DA6502 DA3504 DA1002

Power Output, 4 ohms: 2 x 40 watts 2 x 65 watts 4 x 35 watts 2 x 100 watts

Power Output, 2 ohms: 2 x 50 watts 2 x 75 watts 4 x 50 watts 2 x 150 watts

Power Output, Bridged 4 ohms: 100 watts 150 watts 2 x 100 watts 300 watts

Frequency Response: 20Hz ~ 20kHz +1dB, –2d 20Hz ~ 20kHz +1dB, –2dB 2 Hz ~ 20kHz +1dB, –2dB 20Hz ~ 20kHz +1dB, –2dB

Input Sensitivity: 250 mV ~ 4V 250 mV ~ 4V 250 mV ~ 4V 250 mV ~ 4V

THD + Noise (4 ohms): 0.1 % 0.1 % 0.1 % 0.1 %

Signal-to-Noise: >90dB >90dB >90dB >90dB

Maximum Current Draw: 18A 14A 34A 32A

Dimensions (W x H x L): 9-5/8" x 2-1/4" x 8-1/4" 9-5/8" x 2-1/4" x 9-3/4" 11-5/8" x 2-9/16" x 11-7/8" 11-5/8" x 2-9/16" x 11-5/16"

JBL Consumer Products
250 Crossways Park Drive

Woodbury, NY 11797

www.jbl.com

244 x 57 x 210mm 244 x 57 x 248mm 295 x 65 x 300mm 295 x 65 x 290mm

Part No. DECAMPOM
Made in Korea