Madrigal Imaging N380S ユーザーズマニュアル

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Precise 

control is essential for obtaining accurate soundstaging. Output

imbalances due to asymmetrical placement of the loudspeakers in the room are
common, and degrade imaging accuracy.

To correct this problem, place the Nº380S in 

mode and center the resulting

image (which should be quite small) directly between the loudspeakers, using
the 

control. Differences as small as 0.1 or 0.2 decibels have been found

to be significant. Try it.

Note that this “mono trick” can correct only for differences that occur after the
preamplifier in the signal chain, things like asymmetrical placement of loud-
speakers or slight mismatches in sensitivity between speakers. If a particular re-
cording is out of balance, you will have to adjust the balance more subjectively, as
always.