from the manual:
To adapt to the sensitivity of the
speaker system connected to
BeoLab 2, it has a SETUP switch
with three settings.
To filter out the natural bass
change obtained if a loudspeaker
is placed e.g. in a corner, as
compared to a more freestanding
position, BeoLab2 has a POSITION
switch with three settings as well.
Setting the SETUP switch
Use the SETUP switch to adapt the output
from BeoLab 2 to the sensitivity levels of
the different BeoLab speakers.
The switch has three settings (1, 2, and 3),
and which switch setting to choose
depends on your speaker setup. The table
to the right shows which setting to use
with the different models of BeoLab
speakers.
If, for example, you have a pair of BeoLab 1
speakers connected to BeoLab 2, you
should set the SETUP switch to 1, and so
on…
If you have a Dolby Digital system, and
therefore no speakers are directly connected to
BeoLab 2, we recommend that you set the
SETUP switch to 3.
1 BeoLab 1
2 BeoLab Penta, BeoLab 8000, BeoLab 6000,
BeoLab 4500, BeoLab 4000
3 BeoLab 2500
SETUP
If you connect BeoLab Penta to BeoLab 2,
we recommend that you set the INPUT LEVEL
switch on the BeoLab Penta to its middle
position.