Madrigal Imaging N38 - Manual (Page 27)

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display will alternatively read the alias of the chosen input and “RECD
OFF” as shown below.
Defeating the Record Outputs eliminates even the possibility that the
input impedance of a recording device could have an effect on the
sound quality of the preamplifier. We recommend that Record
Outputs be turned OFF when not in use.
The Balance mode gives you extremely fine control over the relative
volumes of the Left and Right channels, by changing the volume of
one relative to the other in increments of 0.1 dB, up to 20.0 dB.
(Beyond this point, the Balance control will mute the output of the
reduced channel.) Once set, this inter-channel difference in volume
remains the same regardless of Output Level and selected input, until
it is changed again in the Balance mode, or when AC power is
interrupted (in which case the Balance is reset to 0.0).
To enter the Balance mode from the Monitor mode, press the Mode
button twice (once from the Record Select mode). When the balance
is set to a neutral position, favoring neither channel over the other, the
display will show a double-headed arrow and “0.0” decibels—that is,
that the channels are balanced with respect to one another.
Turning the Output Level control in either direction will change the
balance in that direction. The display will reflect this by changing to
the appropriate single-headed arrow to indicate the direction of
change and by showing the number of decibels by which that
channel has been increased (in tenths of a decibel), as below:
In this example, the Right channel is 2.3 decibels louder than the Left.
Precise balance control is essential for obtaining accurate sound-
staging. Output imbalances due to asymmetrical placement of the
loudspeakers in the room are common, and degrade imaging
accuracy. To correct this problem, place the Nº38 in mono mode and
center the resulting image (which should be quite small) directly
between the loudspeakers, using the Balance control. Differences as
small as 0.1 or 0.2 decibels have been found to be significant. Try it.
The Balance Mode
Balance control tip