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P-4020/4040 OM. 7/14/98 11:42 AM Page 1
Power Series Amplifiers
P-4020, P-4040 Owner’s Manual
GENUINE JBL
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P-4020/4040 OM. 7/14/98 11:42 AM Page 2 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- Amplifier Features About This Manual atures are above 194° F (90° C), short Thank you for purchasing your new • 4-, 3- or 2-channel operation (P-4040) To attain maximum amplifier perfor- circuits occur, or current draw exceeds JBL
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P-4020/4040 OM. 7/14/98 11:42 AM Page 3 P-4020 P-4040 MADE IN THE U.S.A. MADE IN THE U.S.A. SPEAKER OUTPUTS SPEAKER OUTPUTS BRIDGE POWER FUSE FRONT BRIDGE POWER – L – ++ R + BATT REM GND – L + – R + FUSE 20A +BATT REM GND 30A REAR BRIDGE 4 6 4 6 5 5 • Always wear protective eyewear when using tools. LINE LEVEL SPKR LEVEL IN LINE LEVEL AUX SPEAKER LEVEL IN INPUT REAR AUX INPUT OUT +R– –L+ FRONT REAR OUT + + • When routing cables, keep input signal R L L R L L – – +R– –L+ cables
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P-4020/4040 OM. 7/14/98 11:42 AM Page 4 2. Locate the 3-connection barrier strip labeled +Batt, Rem and Gnd. Connect a FREQUENCY INDUCTOR CAPACITOR black wire (at least 12G) to the Gnd ter- Crossover 6dB/oct. LP 6dB/oct. HP minal and connect the other end to the 2. If you are connecting the amplifier to (4 ohm) (4 ohm) nearest bare-metal chassis component. a factory-installed source unit, or to a Then, connect a red wire (at least 12G) source unit that only has speaker-level 75Hz 8.0mH 530μF
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P-4020/4040 OM. 7/14/98 11:42 AM Page 5 3. After adjusting the level of the main speakers in your system, you should From adjust the remaining channels (if you IN4001 Diode To are using a P-4040 or a multi-amp Source System Setup and Adjustment Amp system) for the desired system bal- Unit Electronic Crossover ance. You’ll find this easiest to do by The electronic crossover in the P-4020 and adjusting the channels in the following P-4040 should be used to route the appro- order: 1) front spea
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P-4020/4040 OM. 7/14/98 11:42 AM Page 6 MADE IN THE U.S.A. SPEAKER OUTPUTS BRIDGE Figure 4. In this example system, FUSE POWER Figure 1.This wiring diagram shows – L – ++ R + BATT REM GND 20A the front channels of a P-4040 a JBL P-4020 amplifier set to stereo MADE IN THE U.S.A. SPEAKER OUTPUTS FRONT BRIDGE POWER drive a pair of 5-1/4" 2-way speak- to drive a pair of full-range speakers. – L + – R + FUSE 30A +BATT REM GND ers, and the rear channels are bridged to drive a single
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P-4020/4040 OM. 7/14/98 11:42 AM Page 7 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 JBL P-4020 (or P-4040). 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 We, JBL Europe A/S Kongevejen 194B res
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P-4020/4040 OM. 7/14/98 11:42 AM Page 8 Specifications P-4020, P-4040 Specifications JBL P-4020 JBL P-4040 Power Output, 4 ohms: 2 x 40 watts 4 x 40 watts Power Output, 2 ohms: 2 x 50 watts 4 x 50 watts Power Output, Bridged 4 ohms: 100 watts 100 watts x 2 Frequency Response: 20Hz ~ 20kHz +0dB, –1dB 20Hz ~ 20kHz +0dB, –1dB Input Sensitivity: 250mV ~ 4V 250mV ~ 4V THD + Noise (4 ohms): 0.05 % 0.05 % Signal-to-Noise: >100dB >100dB Maximum Current Draw: 18A 40A Dimensions (W x H x L): 7-5/8" x 2-
