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11. +/ - – These increment/decrement buttons have different functions, depending upon

whether a front panel button is ﬂashing or not. If a front panel button is ﬂashing, they are

used to increment or decrement the value of the selected parameter. (For example, if the

PRESET button is ﬂashing, the +/- buttons step through the various equalization presets.)

If no front panel button is ﬂashing, the +/- buttons adjust the overall system volume.

(Press the + button to increase system volume and the – button to decrease system

volume.)

In addition, by pressing both the + and – buttons at the same time, they can be used to alter

the brightness of all front panel buttons and the Meter Display. There are six settings; at

the lowest setting, all buttons and meter segments are completely off, and only the JBL

logo glows to indicate power.

Rear Panel

LSR4328P/ LSR4326P Rear Panel

1. Input Sensitivity switch – In the OUT position, selects -10 dBV sensitivity for the analog

input. In the IN position (pressed in), selects +4 dBu sensitivity for the analog input.

2. Analog XLR Balanced input connector. Connect analog audio input signal here.

3. Analog ¼″ Balanced input connector. Alternatively, analog audio input signal can be

connected here. CAUTION: Use either the ¼″ or the XLR input, Do not

connect sources to both analog inputs simultaneously.

Positive voltage to Pin 2 of the XLR connector or the tip of the ¼″ jack will produce a

forward motion in the speaker cone. See Appendix C in this manual for wiring diagrams.

Reference - Rear Panel

JBL LSR4328P User Manual

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