4
LEVEL ADJUSTMENT
Generally in a home theater application, volume level is controlled by the A/V surround processor. In a system for
use with the ST125.3, ST125.2 or ST125.1, adjustment of the volume level must be performed using the external
preamplifier/processor.
INPUTS
The ST125.3, ST125.2 or ST125.1, allows signal patch cables (interconnects) to be sourced from either balanced
or unbalanced line level preamplifier/processor outputs. A switch is used to configure a PAIR of AMPLIFIER
CHANNELS for use with either balanced (XLR) or RCA unbalanced preamplifier/processor line outputs.
INPUT 4
INPUT 5
XLR (BALANCED)
RCA (UNBALANCED)
INPUT 4
INPUT 5
XLR BALANCED
There are up to 3 balanced input connectors on the ST125.3, ST125.2 and ST125.1. These connectors accept
balanced line level output from the preamplifier’s balanced output connectors.
PIN 1 - GND
PIN 2 - (+)
PIN 3 - (-)
PIN 1 - GND
PIN 2 - (+)
PIN 3 - (-)
2
1
3
Balanced (XLR) connector
RCA UNBALANCED
There are up to three RCA unbalanced input connectors on a ST125.3, ST125.2 and ST125.1. These connectors
accept RCA unbalanced line level output from the preamplifier’s RCA output connectors.
RCA connector
