FUSE
30A
BRIDGE
– R +– L +
MADE IN THE U.S.A.
+BATT REM GND
BRIDGE
SPEAKER OUTPUTS
POWER
FRONT
REAR
30
6
20
– R +– L ++BATT REM GND
BRIDGE
SPEAKER OUTPUTS
POWER
FUSE
20A
MADE IN THE U.S.A.
FUSE
30A
BRIDGE
– R +– L +
MADE IN THE U.S.A.
+BATT REM GND
BRIDGE
SPEAKER OUTPUTS
POWER
FRONT
REAR
30
20
– R +– L ++BATT REM GND
BRIDGE
SPEAKER OUTPUTS
POWER
FUSE
20A
MADE IN THE U.S.A.
LEVEL
INPUT MODE
MO ST
4V .250V
XOVER
FLATHPLP
2V
20
– R +– L ++BATT REM GND
BRIDGE
SPEAKER OUTPUTS
POWER
FUSE
20A
MADE IN THE U.S.A.
LEVEL
INPUT MODE
MO ST
4V .250V
XOVER
FLATHPLP
2V

Figure 1. This wiring diagram shows

a JBL P-4020 amplifier set to stereo

to drive a pair of full-range speakers.

Figure 2.This wiring dia-

gram shows a JBL P-4020

amplifier set to bridge

mode (mono) to drive a

single subwoofer.

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.

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.

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
FLATHPLP
LEVEL
4V .250V
2V2V REAR
INPUT
+R–
+R–
–L+
–L+
AUX
OUT
R
L
R
L
FRONT
FRONT
REAR
LINE LEVEL
INPUT
SPKR LEVEL IN
REAR
R
L
LINE LEVEL
INPUT SPEAKER LEVEL IN
R
+
–
L
+
–
AUX
OUT
R
L

Figure 5. In this expanded system, a JBL P-4040 drives two pairs of 6-1/2" 2-way speakers.

The JBL P-4040’s pre-amp outputs feed a JBL P-4020 to drive a single 12" subwoofer in

bridge mode.

ST MO
INPUT MODE
INPUT
PRE OUT
LEVEL
INPUT MODE
MO ST
4V .250V

FRONT

F+R
FLAT
REAR
LP
FRT
LP
FRT REAR

REAR

XOVER
FLAT HP LP
XOVER
FLATHPLP
LEVEL
4V .250V
2V2V
20
– R +– L ++BATT REM GND
BRIDGE
SPEAKER OUTPUTS
POWER
FUSE
20A
MADE IN THE U.S.A.
LEVEL
INPUT MODE
MO ST
4V .250V
XOVER
FLATHPLP
2V
LEVEL
INPUT MODE
MO ST
4V .250V
XOVER
FLATHPLP
2V
P-4020/4040 OM. 7/14/98 11:42 AM Page 6