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The supplied calibration microphone must be connected to perform RMC. If the RMC
button is pressed and held for 3 seconds or longer and no mic is connected, the meter
display will flash to indicate an error condition, and all RMC settings currently in memory will
be erased.
RMC error condition
To bypass the calibrated settings and compare the original, uncompensated performance with
the corrected performance, press the RMC button so that it lights up. This allows you to listen
to the speaker without the filter, delay, level trim and meter calibration applied during the
RMC process. To restore RMC functions, press the button again. The button will no longer be
illuminated.
Equalization
Equalization is provided to tailor response to preference, or acoustic conditions in the room.
The LSR4300 offers two bands of onboard digital equalization (high and low frequency),
with up to 2 dB of cut and boost in each band. The equalization is shelving type with centers
of 500 Hz for low frequency and 2 kHz for high-frequency. Using the supplied LSR4300
Control Center software, the corner frequency for each band is adjustable from 20 Hz to 1 kHz
(LF) and 1 kHz and 20 kHz (HF).
To turn equalization on, press the EQ button on any networked speaker so that it lights up.
The LF and/or HF buttons immediately to the right of the EQ button will also light up if the
current setting contains LF or HF boost or cut. (If the current EQ setting contains “flat” LF or
HF equalization – that is, no boost or cut – the associated button will not light.)
To apply equalization, simply press the LF or HF button (it will begin blinking), followed by
the +/- buttons. The meter display LEDs will light (all in green) to show you the amount of
cut or boost. If only the two LEDs on either side of the center (-15) mark are lit, that is an
indication that the selected equalization band is flat (i.e., no cut or boost). LEDs lit to the right
of center (that is, to the right of the –15 mark) indicate the amount of equalization boost, while
LEDs lit to the left of center (that is, to the left of the –15 mark) indicate the amount of
equalization cut. With every 0.25 dB of equalization boost or cut, an additional two LEDs
light. Thus, for example, an equalization boost of 1 dB is indicated by eight LEDs lit to the
right of the center (-15) mark.
Reference - Performing An RMC Calibration/Equalization