B&K ST55.2 - Manual (Page 8)

5
LEVEL CONTROLS
There are two level controls on the back of the amplifier. One level control for each channel. When using the level
controls, first start with them turned all the way up (clockwise). Then adjust them according to your system
requirements to match the sound level coming from each speaker. This is a rough adjustment for matching
different driver impedances. Any fine tuning should be done by the preamplifier.
Example: When using 4 ohm and 8 ohm speakers together, the 4 ohm may sound louder then 8 ohm at a given
volume level. The level controls on the amplifier are used to match the speaker’s volume level. Clockwise will
increase the output. Counter clockwise will decrease the output.
Louder Softer
INPUTS
RCA type connectors accept line input from the preamplifier’s unbalanced output connectors. There are two input
connectors, one for each channel, which may be used to connect the amplifier to the preamplifier.
RCA connector
Here is a typical input setup:
BUS INPUT
LEFT
RIGHT
LEFT
RIGHT MONO
BUS OUTPUT
R
M
L L
From Left Output
Of Preamplifier
From Right Output
Of Preamplifier
Left Channel Output
to Another Amplifier
R
Right Channel Output
to Another Amplifier
Left & Right (Mono) Channel
Output to Another Amplifier
You will notice the OUT BUS connections shown above. You may use these to connect to another amplifier. The
L BUS OUT carries the same signal as the L INPUT. The R BUS OUT carries the same signal as the R INPUT.
The L+R BUS OUT carries the combined signal from the left and right inputs
.
OUTPUTS
Five way binding posts are provided. One pair for each channel. They are designed to accept a banana-type plug
or spade lug connector (shown below) and are color coded for easy identification. The red (+) post should always
be connected to the speakers (+) jack. The black (-) post should always be connected to the speakers (-) jack.
Spade connector Banana jack