19
Installation
The MATCH PP 52DSP must be connected to
the head unit (radio) as follows:
Caution:
Carrying out the following steps will
require special tools and technical knowledge. In
order to avoid connection mistakes and/or dama-
ge, ask your dealer for assistance if you have any
questions and follow all instructions in this manual
(see page 13).
1.
After removing the radio from the dash using
appropriate tools, disconnect the vehicle harness
from the radio. Next, connect the vehicle harness
to the male connector of the MATCH cable harness,
see fig. 3
1
Depending on your car an additional car-specific
adaptor may be required.
A list of all cars and the respective adaptors can be
found on www.audiotec-fischer.com.
2.
Connect the female connector of the MATCH
cable harness or the car-specific adaptor to the ra
-
dio,
see fig. 3
2
.
3.
There are two alternatives which are described
in sections 3a and 3b to connect the PP 52DSP
to power. As long as a subwoofer is connected to
the PP 52DSP, we recommend to use alternative
3b (depending on wire gauge and fuse rating of the
vehicle’s harness).
Short interrupts in music reproduction at high liste-
ning levels are an indicator for significant voltage
drops on the power supply due to insufficient vehi
-
cle cable harness dimension.
3a.
Power supply via vehicle cable harness:
In this case the PP 52DSP will be directly powered
from the vehicles radio harness. Carefully check
its wire gauge and fuse rating first. If fuse rating is
significantly lower than 20A then we strongly recom
-
mend
option 3b.
Depending on the vehicle type, the connections for
switched (ACC+) positive terminal and constant po-
sitive terminal can be different. The PP 52DSP must
not be powered using the switched positive terminal
as this might result in da-mage to the vehicle‘s elec-
tronic circuits. Verification of the right terminal must
be made prior to activation of the unit at connec-
tions
E
(yellow) and
F
(blue) with a voltmeter.
The constant positive wire is identified by a reading
of 12V even when the vehicle is turned off. After
measuring, connect cable
G
to the constant posi-
tive terminal (
compare fig. 4
).
If you are unable to
identify the appropriate wires, please ask your
dealer for help.
3b.
Direct power supply via the battery:
If the power supply of the PP 52DSP cannot be pro-
vided via the vehicle cable harness (max. 20 A), you
have to connect it directly to the car battery. To do
so, disconnect joints
H
(ground) and
I
(+12V)
of the MATCH harness (
refer to fig. 5
). Next, the
ground cable (min. AWG14 / 2.5 mm²) should be
connected to a common ground reference point
(this is located where the negative terminal of the
battery is grounded to the metal body of the vehi-
cle), or to a prepared metal location on the vehi-
cle chassis, i.e. an area which has been cleaned
of all paint residues.
Always disconnect the car
battery’s negative terminal before you execute
the following steps.
Connect the +12V power ca-
ble (min. AWG14 / 2.5 mm²) to the positive terminal
of the battery. The positive wire from the battery to
the PP 52DSP harness connection needs to have
an inline fuse (20 A) at a distance of
no more than
12 inches (30 cm) from the battery
. Insulate the
now unused connections of the MATCH harness
with tape or other appropriate material. You can
now reconnect the car battery. If one of the cable
extensions PP-EC11, PP-EC25 or PP-EC40 will
be used, the separate power supply has to be con-
nected to the extension cable.
4. Connect the MATCH harness to the MATCH PP
52DSP, see
fig.
3
3
.
Optimizing the amplifier gain setting:
Turn the car radio on and the volume up gradual-
ly. Maximum volume has been reached when lou-
dspeaker distortion becomes audible. To increase
volume range of the radio use the MODE switches
nos. 1 and 2 (refer to page 17) to reduce the overall
gain of the PP 52DSP. If your radio is at maximum
volume without any distortion being audible, you
can use the MODE switches to increase the am-
plifier overall gain by +2 dB. Be careful when using
this function.
