HELIX C Four Manual page 14

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