JBL MSC1 Owner's Manual page 12

Section 5: Features and Operation
8. INPUT LEDs – These LEDs (Light Emitting Diodes) provide visual indication
of incoming signal. The SIGNAL LED illuminates whenever signal of any
strength is present at the selected input (see #6 above). The CLIP LED
illuminates when signal is within 3 dB of the MSC1 maximum level output. It is
acceptable for this LED to illuminate occasionally. If the CLIP LED illuminates
frequently or continuously, reduce the setting of the INPUT TRIM Control
or use available level controls on the connected equipment to reduce the
equipment output level.
9. RMC ON Control – Once RMC calibration has been performed this button
allows you to quickly and easily compare the "A" SPEAKER OUTPUT signal
with and without Room Mode Correction. When illuminated, signal is sent to
speakers connected to "B" SPEAKER OUTPUTS with RMC processing applied.
(See the MSC1 Control Center Software User's Guide.) Press this button again
(no illumination) to hear the signal without RMC.
10. EQ ON Control – Activates or deactivates MSC1 EQ available for speakers
connected to the "A" SPEAKER OUTPUT. When illuminated, an equalized
signal is sent to the speakers connected to "A" SPEAKER OUTPUT.
Press again (no illumination) to listen to the "A" speakers without equalization.
(See the MSC1 Control Center Software User's Guide.)
Note: EQ is applied to the Left and Right speakers connected to "A" SPEAKER
OUTPUTS only. Equalization does not affect Speakers connected to "B" SPEAKER
OUTPUTS nor the Subwoofer or headphones.
Note: If enabled, the RMC and / or EQ Controls flash repeatedly instead of illuminating
steadily when "B" SPEAKER OUTPUTS are selected because EQ processing is
available on "A" SPEAKER OUTPUTS only.
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