9
Input Sensitivity
This control is used to adapt the input sensitivity of
the low- and highlevel inputs to the output voltage
of the connected signal source. This is not a volume
control, it´s only for adjusting the amplifier gain. The
control range of the RCA /
Line Input
is 2 - 4 Volts
and 5 - 10 Volts for the
Highlevel Input
. The input
sensitivity range can be changed by repositioning
jumpers inside the device.
Attention:
It is mandatory to properly adapt the
input sensitivity of the V EIGHT DSP to the signal
source in order to avoid damage to the amplifier.
10
Output Channels
Speaker outputs to connect speaker systems. The
impedance per channel must not be lower than
2 Ohms.
Important:
We highly recommend to make the gen-
eral settings in the DSP PC-Tool software before
the first start-up. Especially if the V EIGHT DSP
will be used to drive fully active speaker systems, a
wrong setup can destroy your tweeters right away.
11
GND
The ground cable should be connected to a com-
mon ground reference point (this is located where
the negative terminal of the battery is grounded
to the metal body of the vehicle) or to a prepared
metal location on the vehicle chassis i.e. an area
which has been cleaned of all paint residues. Rec-
ommended cross section: min. 16 mm² / AWG 6.
12
REM
The remote input has to be used to turn on/off the
V EIGHT DSP if the signal source which is connect-
ed to the
Highlevel Input
is not activating the “auto
-
matic turn-on” function or if the amplifier shall only
be activated/deactivated by a remote signal applied
to the remote input. The remote lead should be con-
nected to the remote output / automatic antenna
(aerial positive) output of the head unit/car radio.
This is only activated if the head unit is switched
on. Thus the amplifier is switched on and off togeth
-
er with the head unit. This input needn´t to be as-
signed if the
Highlevel Input
is used. To deactivate
the “automatic turn-on” function read the description
on page 21 point 7, “Configuration of the remote in
-
put”.
13
+12 V
Connect the +12 V power cable to the positive ter
-
minal of the battery. Recommended cross section:
min. 16 mm² / AWG 6.
14
Line Output
Processed 2-channel pre-amplifier output with a
maximum output voltage of 3 Volts RMS for con
-
necting additional power amplifiers. Please make
sure that you always turn on/off external ampli
-
fiers using the remote output (
Rem Out
) of the
V EIGHT DSP. Never directly control the external
amps by a signal from the ignition switch of your
car! Additionally this output will be turned off when
the “Power Save Mode” of the amplifier is active.
The outputs can be assigned to any of the inputs as
desired using the DSP PC-Tool software.
15
Rem Out
We strongly recommend to use this output for turn-
ing on/off additional amplifiers that are connected to
the
Line Output
of the HELIX V EIGHT DSP. This is
essential to avoid any interfering signals. This out
-
put is activated automatically as soon as the boot
-
ing process of the DSP is completed. Additionally
this output will be turned off during the “Power Save
Mode” or a software update process.
18
Initial start-up and functions
