Operation Manual

23
ENGLISH
{ Channel no.1 XLR input
} PRESENCE CONTROL (f = 2.15 kHz) common for all the channels 1, 2, 3, 4.
q AUX INPUT (A & B) TREBLE and BASS controls.
w AUX INPUT A with dual RCA connector.
i
The two channels of the stereo source connected to the AUX INPUT A are summed internally
(to get a mono signal); the same for the stereo source connected to the AUX INPUT B.
e AUX INPUT A GAIN control.
r AUX INPUT B with dual RCA connector.
t AUX INPUT B GAIN control.
y PRE OUT audio output (with RCA connector) that sends the same signal routed to the internal
amplifier (signal that can be either a single source with priority or the mix of all the channels 1,
2, 3, 4 and the selected AUX INPUT).
i
Use PRE OUT for connection of additional external amplifiers.
u MUSIC ON HOLD audio output (with RCA connector) that sends a mono signal of the source
connected to the AUX INPUT A.
i
The MUSIC ON HOLD output (if an external music source has been connected to the AUX
INPUT A) can be used for the connection to a telephone system (in order to have the ‘music on
hold’ function).
BALANCED CONNECTION
+ hot
– cold
GND ground
UNBALANCED CONNECTION