18
Installation
The HELIX PP50 DSP must be connected to the
head unit (radio) as follows:
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 que-
stions and follow all instructions in this manual.
It is recommended that this unit be professionally
installed only by an authorized HELIX dealer.
1.
After removing the radio from the dash, discon-
nect the vehicle harness from the radio. Next, con-
nect the vehicle harness to the ISO terminals of the
HELIX cable harness,
(Fig. 3).
2.
Connect the ISO terminals of the HELIX cable
harness to the radio,
(Fig. 3).
Depending on your ve-
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harness. Please check our vehicle-list in the plug &
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out if an additional adapter for installing the PP50
DSP is needed.
3.
Connect the HELIX cable harness to the PP50
DSP,
(Fig. 3).
4.
There are two
alternatives
which are described
in sections 4a and 4b to connect the PP50 DSP to
power.
4a.
Power supply via vehicle cable harness:
The PP50 DSP is designed to be powered using the
12V and ground connections found in the vehicles
radio harness. Depending on the vehicle type, the
connections for switched positive and constant po-
sitive can be different.
The PP50 DSP must not be powered using the swit-
ched positive connection as this might result in da-
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of switched positive and constant positive must be
made
prior to activation of the unit
at connections
E
(yellow) and
F
(blue) with a voltmeter
(Refer to
Fig. 4a)
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reading of 12V when the vehicle is turned off.
After measuring, connect cable
G
to the constant
positive connection
(compare Fig. 4a)
. If using a
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-
guration will be correct for the vehicle you are con-
necting to.
If you are unable to identify the appropriate
wires, please ask your dealer for help.
4b.
Direct power supply via the battery:
If the power supply of the PP50 DSP cannot
be provided via the vehicle cable harness (max. 20
A), you can connect the PP50 DSP directly to
the car battery. To do so, disconnect connec-
tions
H
(ground) and
I
(+12V). Next, the ground
cable should be connected to a common ground
reference point (this is located where the negati-
ve terminal of the battery is grounded to the metal
body of the vehicle), or to a prepared metal loca-
tion on the vehicle chassis, i.e. an area which has
been cleaned of all paint residues. Prior to this step,
Before you undergo this step, disconnect the
car batterys negative terminal.
Connect the +12V
power cable to the positive terminal of the battery.
The positive wire from the battery to the PP50 DSP
harness connection should have an inline fuse (20
A) at a distance of no more than 12 inches (30 cm)
from the battery. Insulate the now unused connec-
tions of the PP50 DSP wire harness
J
. You can
now reconnect the car battery
(Refer to Fig. 4b)
.
Optimizing the loudspeaker setting
Turn the car radio on and the volume up
gradually. Maximum volume has been reached
when loudspeaker distortion becomes audible. To
increase the volume range of the radio use the
MODE / DIP switches nos. 3 and 4 (refer to page
22) to reduce the output volume of the PP50 DSP by
-2 dB. If your radio is at maximum volume without any
distortion being audible, you can use the MODE / DIP
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+2 dB or +4 dB. Be careful when using this function.
Only increase the volume gradually by +2 dB at a
time to prevent loudspeaker damage.
Caution
:
The PP50 DSP might have more
power than your head unit / radio. Most fac-
tory system loudspeakers can cope with
this easily. However, be very careful with
the volume control. Excessive volumes can
result in a distorted sound and can damage the
vehicles loudspeakers.
