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Tutorials and Applications, Chapter 15
15-12 ALESIS M20 REFERENCE MANUAL 1.06
TUTORIAL 7: USING THE M20 WITH UNBALANCED
INPUTS AND OUTPUTS
It is possible to use unbalanced signals with the M20, however you will need adapters like
the following:
Note that it is probable that unbalanced lines will not have enough level to drive the M20 to
full scale, and will require preamplification, or the input trimmers of your M20 must be reset
to accommodate lower levels. The standard factory setting is +19 dBu = 0 dBFS (just before
clipping). A mixer with a standard output of +4 dBu at 0 VU should light “-15 dB” on the
M20’s meter.