Installation
Connection of HELIX P SIX DSP to the head unit/
car radio:
Caution:
Carrying out the following steps will re-
quire special tools and technical knowledge. In or-
der to avoid connection mistakes and / or damage,
ask your dealer for assistance if you have any ques-
tions and follow all instructions in this manual (see
page 13). It is recommended that this unit will be
installed by an authorized HELIX dealer.
1. Connecting the pre-amplifier inputs
Use the correct cable (RCA / cinch cable) to
connect these inputs to the pre-amplifier /
lowlev el / cinch outputs of your car radio. Each
input can be assigned to any output using the
DSP PC-Tool software. The automatic turn-on
circuit does not work when using the pre-amplifi
-
er inputs. In this case the „Remote Input“ (REM)
has to be connected to activate the HELIX
P SIX DSP.
Important:
It is strictly forbidden to use the
highlevel input and pre-amplifier inputs at the
same time. This may cause severe damage to
the pre-amplifier outputs of your car radio.
2. Connecting the highlevel speaker inputs
The highlevel loudspeaker inputs can be con
-
nected directly to the loudspeaker outputs of an
OEM or aftermarket radio using appropriate ca-
bles (loudspeaker cables with 1 mm² / AWG 18
max.). It is not mandatory to use all speaker
inputs. Make sure that the polarity is correct. If
one or more connections have reversed polarity
it may affect the performance of the amplifier. If
this input is used the remote input (REM) does
not need to be connected as the amplifier will
automatically turn on once a loudspeaker signal
is received.
3. Adjustment of the input sensitivity
Attention:
It is mandatory to properly adapt the
input sensitivity of the P SIX DSP to the signal
source in order to avoid damage to the amplifi
-
er.
If you want to change the input sensitivity use
the three potentiometers at first. The settings of
the potentiometers affects both the lowlevel and
the highlevel inputs!
If the ex factory sensitivity range of the low
-
level input (2 - 4 Volts) resp. highlevel input
(5 - 10 Volts) may not be sufficient it is possible
to change it internally by repositioning jumpers.
In that case you have to open the device. Re
-
move the ten Phillips head screws of the bot
-
tom plate to get access to the jumpers. The long
jumper (
Jumper A
, 16-pins) affects the channels
A - D and the short jumper (
Jumper B
, 8-pins)
the channels E and F. Inside the device there
are two plug positions (
A1
and
A2
) for Jumper A
and three (
B1
,
B2
and
B3
) for Jumper B.
The different plug positions are explained be
-
low:
19
