JBL LSR4312SP Owner's Manual page 21

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If a second LSR4312SP is networked, changing the LFE FILTER frequency in either one will cause both to be
set identically.
9. Subwoofer LEVEL – Allows you to make fi ne adjustment of the subwoofer level, in 0.5 increments, to a
maximum of +/- 7.5 dB. This differs from the overall system volume control (see #11) in that it affects the
LSR4312SP only; other connected LSR4300 speakers are unaffected.
To set the subwoofer level, press the LEVEL button. It will fl ash and the meter display will confi rm the
currently selected level setting. While the LEVEL button is fl ashing (for approximately 3 seconds), you can
use the +/- buttons to change the level setting. The new selection will then be displayed on the meter
display, as shown in the following illustrations, and will be stored in the LSR4312SP after 3 seconds
(or, immediately, by pressing the LEVEL button a second time within that 3-second period). Note that a
level setting of 0.0 dB (the two LEDs on either side of the -15 marker lit) indicates that the subwoofer is
at the same relative volume as all other networked speakers, with no boost or attenuation. As shown in
the following illustrations, each lit LED indicates 0.5 dB of gain; thus, having all 15 LEDs to the right of
0.0 lit indicates the maximum boost of +7.5 dB, while having all 15 LEDs to the left of 0.0 indicates the
maximum cut of –7.5 dB.
Reference - Front Panel
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