JBL P-4020, P-4040 owner manual Controls and Connectors, 4020 4040

• 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-

P-4020

P-4040

MADE IN THE U.S.A.

MADE IN THE U.S.A.

SPEAKER OUTPUTS

POWER

SPEAKER OUTPUTS

BRIDGE

FUSE

FRONT

BRIDGE

F U S E

POWER

–

L

–+

R

+

20A

+BATT

REM GND

–

L +

– R

+

+BATT

REM

GND

3 0 A

0

2

30

REAR

B R I D G E

4

5

6

4

5

6

LINE LEVEL

AUX

LINE LEVEL

SPKR LEVEL IN

INPUT

SPEAKER LEVEL IN

OUT

FRONT

INPUT

+ R –

REAR

AUX

+

+

REAR

– L +

OUT

L

R

L

R

L

L

–

–

+ R –

– L +

R

L

R

FRONT

R

1

2

3

1

2

3

8

11

9

10

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

INPUT MODE	2V
	XOVER
MO ST	LP HP FLAT
	4V LEVEL .250V

7

2V	FRONT	PRE OUT
INPUT MODE	XOVER	F+R	REAR FRT
MO ST	LP HP FLAT	FLAT	LP LP

4V LEVEL .250V

711

8

INPUT	2V	REAR
		XOVER	INPUT MODE
FRT REAR		FLAT HP LP	ST MO

4V LEVEL .250V

11

87

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).

3