a-them mrx 1120/720 Operating Manual page 30

CHANNEL LEVEL
If you're calibrating by ear, use the remote control and sit in the listening area. Adjust each
channel's loudness until all levels sound the same. If using an SPL meter, adjust level so it
reads 75 dB for each channel. If Noise Level is set while Front-L is at 0 dB, no adjustment
of Front-L is needed since the output is the same. If using a powered subwoofer, make a
rough adjustment with its input level control before setting sub level in this menu or using
ARC. Speakers set to "Off: in the Bass Management menu are skipped.
Note that if ARC sets levels and is then turned off, the subwoofer level should be reduced
by the same amount as room gain or the subwoofer level will be elevated when ARC is off.
MULTIPLE SUBWOOFERS
If using multiple subwoofers they should be balanced to one another before
calibrating the rest of your system. If using ARC, simply use the Quick Measure
function to help find flat response as a preliminary step before running full
measurement. If setting up the traditional way, play the subwoofer test noise with
only one subwoofer connected at a time. Set its input level dial so the SPL meter
reads 71 dB from the listening area if using two subs, or 67 dB if using four subs.
Repeat this for the remaining subs. When all are connected the result should be
around 75 dB – make final adjustment in the level calibration menu.
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