Programming Input Offsets - Mark Levinson 380 Owner's Manual

programming
input offsets
26
Rather than compromise the sonic performance of the preamplifier in
an effort to eliminate even the remote possibility of this noise being de-
tected, the setup procedure outlined above for programming input
names was designed to make it virtually impossible to create a condi-
tion under which any such noise can be heard. We recommend using
the input name
NOT USED
The Nº380 allows you to adjust the relative outputs of your various
sources with respect to one another, so as to avoid disturbing and/or
potentially dangerous changes in output levels as you switch from one
source to the next. These
source tends to be the loudest—that is, you raise the outputs of the re-
maining sources to match that of your loudest source. This is achieved
as follows:
1 Decide which source has the highest output
You should listen to several examples of each source before you
decide (e.g., to several different CDs when evaluating your CD
player's output, or to several radio stations when evaluating your
tuner's output). The point is to ascertain whether any source con-
sistently plays more loudly than others, and to bring the others up
to its level. (For example, other things being equal, balanced out-
puts of components are usually approximately 6 dB stronger than
the single-ended outputs.)
2 Listen to this source long enough to establish its volume
Use a particular output level setting to which you can easily re-
turn, such as 60.0 in the display. Develop a sense of the perceived
volume at this setting, which you will want to match with your
other inputs. Optionally, you may desire to measure its actual out-
put at your chosen volume setting with a sound pressure level
(SPL) meter set to "Slow" or "Average" response.
3 Select the first of the sources whose output you will raise
While music is playing from both your reference, "loudest" source
and the source you are about to adjust, select the latter so as to
give you a sense of the magnitude of the adjustment you are about
to make.
for all unused inputs.
are made relative to whichever
input offsets