Reference; Front Panel - JBL LSR4312SP Owner's Manual

Reference

Front Panel

The controls and displays on the front panel of the LSR4312SP allow you to adjust and view various
subwoofer settings. Below is a listing and description of each.
Control and Display:
1. Meter Display – In combination with front panel buttons, the meter is used to display the current
setting and status of the following functions:
• Power On (see #3 below)
• SOLO function (see #4 below)
• Progress of RMC calibration process (see #5 below)
• Bass management crossover frequency (see #7 below)
• LFE fi lter frequency (see #8 below)
• Subwoofer Level (see #9 below)
• Input Source selection (see #10 below)
• Overall system volume (see #11 below)
• Meter and button brightness (see #11 below)
• Error conditions
The meter has 31 segments that can illuminate in green, amber or red, plus a 32nd clip indicator
segment on the far right that lights red when the LSR4312SP is over-driven. For many of the above-listed
operations, all segments light green only. However, when audio signal is being output by the LSR4312SP,
all three colors are used and the meter is calibrated to indicate the continuous output in decibels (dB)
below the subwoofer's full output capability. Green LEDs indicate signal 8 dB (or more) below clipping;
amber, approximately 7 to 4 dB below clipping; and red, approximately 3 to 0 dB below clipping. The
segment furthest to the right illuminates red when the input signal is has reached its maximum value to
indicate the onset of clipping.
LSR4312SP Front Panel
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