P 7520 (serv.man3) - JBL Car Audio User Guide / Operation Manual. Page 6

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3. After adjusting the level of the main

speakers in your system, you should
adjust the remaining channels (if you
are using a P-7540 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, multi-channel systems may
be complex to adjust. Your local JBL
installation specialist is the best
person to help with such adjustment. 

For your convenience, we’ve included
several application diagrams to help you
plan your own system installation.
Figures 1 through 3 show how to
configure the JBL P-7520, P-7540 or 
P-2510 for stereo, bridged-mono, and 
tri-mode operation. 
For system expansion ideas, see Figures
4 and 5.  
NOTE: For simplicity, Figures 1 through 3
do not show power, remote, and input
connections.

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Figure 1. This wiring diagram shows a
JBL P-7520/7540 amplifier set to stereo to
drive a pair(s) of full-range speakers.

Figure 2. This wiring diagram shows a
JBL P-7520/7540 amplifier set to bridge
mode (mono) to drive a single subwoofer
or a pair of subwoofers (P-7540).

Figure 3. This wiring diagram shows a
JBL P-75207540 amplifier set for tri-mode
operation. For a desired crossover
frequency, use the chart on page 4 to
select a inductor for the subwoofer, and
corresponding capacitors for left and
right speakers.

Figure 4. In this example system, a JBL 
P-7540 drives two pairs of 5 1⁄4" speakers.
The JBL P-7540’s pre-amp outputs feed a
JBL P-2510 to drive a single 12"
subwoofer.  

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Figure 5. In this expanded system, a JBL P-7540
drives two pairs of 5-1/4 “ 2-way speakers. The
JBL P-7540’s pre-amp outputs feed a JBL P-2510
which drives single 12" subwoofer. 

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