P 7520 (serv.man3) - JBL Car Audio User Guide / Operation Manual. Page 2

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• 4, 3 or 2 channel Operation (P-7540),  

2 or One channel Operation (P-7520),
Mono Class-D subwoofer channel 
(P-2510)

• Simultaneous stereo and mono

Operation (P-7520, P-7540)

• Built-in 12dB/oct variable electronic

crossover

• Balanced Differential Input 
• Front and Rear Summing Inputs (P-2510)

for Non-fading  Bass

• Pre-amp outputs with crossover (P-7520,

P-7540)

• Oversized Floating Rail Mosfet Power

Supply

• Universal Interface
• Common Sense Turn-on
• Variable Input Sensitivity (250mV-4V)
• Fully Complementary, Direct Coupled

Discrete Power Amplifier Circuitry

• Ultra-efficient Class-D Subwoofer

Amplifier (P-2510)

• Gold-Plated Power, Input and Output

Connectors

• 2-Ohm Stable (stereo)
• JBL badge lights when amp is

operating, and flashes when protection
circuit is activated

• Made in USA

To attain maximum amplifier
performance, we encourage you to read
the remaining pages before installing and
operating your new JBL Power Series
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 Power Series 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.

• The JBL Power Series amplifiers have

five levels of circuit protection that
monitor the amplifiers and will shut
them down if the electrical system
voltage drops below 5 Vdc or exceeds
18 Vdc, 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. 

for purchasing your new JBL

Power Series Amplifier. Power Series
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,  Power Series amplifiers
feature  Universal Interface™, designed to
facilitate integration with factory installed
audio systems for distortion free
performance that rivals conventional pre-
amp connections. Included in the
Universal Interface circuit is Common
Sense™ turn-on. Common Sense turn-on
senses the common-mode voltage
present on the speaker outputs of factory
and aftermarket radios, turning on the
amplifier without a separate remote wire.
All Power Series amplifiers feature built-
in electronic crossovers and pre-amp
outputs for easy system expansion
without requiring outboard processors.