B&K ST1200 Series - Manual (Page 13)

Page 11
The ST1200 series II ’s two output channels may be paralleled (mono) to combine the
left and right channels output current. This feature allows the amplifier to double its
apparent output current. To use, place the source group jumper for both channels on
the ‘L BUS’ jumper terminal. Place the volume group jumper for both channels on the
‘NO VOL’ jumper terminal.
The speaker output terminals on the ST1200 series II ’s rear panel must be paralleled in
order to complete the setup. Simply connect the (+) terminals for both channels
together using a jumper wire (not supplied with the amplifier). Finally, connect the
speaker cables from the left channels (+) and (-) terminals to the speakers. Input your
source signal into the left channel input. The instructions show the use of the left
channel. You may also use the right channel if you desire, just follow the above
instructions using the right channel. You may also use the L+R BUS to send a mono
signal out of the amplifier derived from the left and right channels. See below: