14
Connectors and control units
1
Optical Input
Optical inputs for digital stereo signals
( SPDIF format).
2
SPDIF Direct In switch
Switch for routing the digital input signal
directly to the amplifiers internal power stage.
3
Line Input
RCA inputs for connecting lowlevel line
signals.
4
GND
Connector for the ground cable (negative
terminal of the battery or metal body of the
vehicle).
5
+12 V
Connector for the +12 V power cable of the
positive terminal of the battery
.
6
REM
Connector for the remote cable.
7
Output Channels
Speaker outputs for connecting speaker
systems.
8
LPF
Control for adjusting the lowpass filter of the
channel pairs A / B and C / D from 15 Hz to
4,000 Hz.
9
HPF
Control for adjusting the highpass filter of the
channel pairs A / B and C / D from 15 Hz to
4,000 Hz.
8
9
7
7
8
9
C FOUR side view standard version
1
4
5
6
C FOUR side view with optionally available HELIX Digital Input Module HDM 2
2
3
