Adam Sub12 Bedienungsanleitung Seite 4

Mode
This push button gives a choice between Signal On: woofer starts op-
eration as soon as a musical signal arrives, and stops after 15 minutes
without a signal. Continuous: the unit is always working.
We recommend the "Signal on" position that minimises power consumption and
has proved to be practical that way as you do not need to look for the main power
switch any more.
Phase Switch
With the Phase switch you can alter the phase of the SubP relative to
the satellites. Practically it means you change the polarity of the bass
unit. Depending on the distance between woofer and satellites 0° or 180° may
be the better position. There is no "right" or "wrong" position, you have to find
out by yourself what sounds better, more exactly and more homogeneous in the
low end.
Controls and connectors on the backside
Manual Sub12 - page 4