GAS PRO Series, Owner'S Manual, Page: 3 / 8

There is no correct gain setting. Because speakers
require different power demands to reach the same
output, the gains most often need to be used to
compensate for these differences. If you tried to set
all the gains at half way you would probably find the
system didn't sound very good. Using good
judgment and listening carefully to each speaker is
still the best way to tune a system.
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