26
To simplify installation to an OEM or aftermarket
radio the M 5DSP MK2 can also be connected
using the optional PP-ISO cable (2.2 m version,
art. no. H424922). This cable allows to supply the
amplifier with both power and loudspeaker signals
of the radio. No factory wires or plugs need to be cut
by using this connection method.
ATTENTION: In “HighPower” mode the power
supply of the M 5DSP MK2 must be connected
directly to the car´s battery by using a separate
cable with sufficient cable cross-section. Disre
-
garding this note may result in damage of the
car audio system!
Connection to an OEM radio is detailed below:
1.
After removing the car radio from the dash us
-
ing appropriate tools, disconnect the vehicle
harness from the car radio. Next, connect the
vehicle harness to the female connector of the
PP-ISO cable, fig. 3
1
.
Depending on your car an additional car-specif-
ic adaptor may be required.
A list of all cars and the respective adaptors can
be found on
www.audiotec-fischer.com
.
2.
Connect the male connector of the PP-ISO ca-
ble (fig. 3
2
) to the car radio.
3.
Subsequently connect the 20-pole connector of
the PP-ISO cable to the amplifier.
4.
There are two
alternatives
to connect the
M 5DSP MK2 to power described in section 4a
and 4b.
ATTENTION: In “HighPower” mode alterna-
tive 4b must be used.
When connecting a subwoofer to the
M 5DSP MK2, we also recommend to use alter-
native 4b. Short interrupts in music reproduc
-
tion at high listening levels are an indicator for
significant voltage drops on the power supply
due to insufficient vehicle cable harness dimen
-
sion.
4a.
Power supply via vehicle cable harness:
In this case the M 5DSP MK2 will be directly
powered from the vehicle´s car radio harness.
Carefully check its wire gauge and fuse rating
first. If fuse rating is lower than 20 A then we
strongly recommend option 4b.
Note:
Depending on the vehicle type the con
-
nections for switched (ACC+) positive ter
-
minal and constant positive terminal can be
interchanged. The M 5DSP MK2 must not be
powered using the switched positive terminal
as this might result in damage to the vehicle‘s
electronic circuits. Verification of the right termi
-
nal must be made prior to activation of the unit
at connections
F
(yellow) and
G
(blue) with
a voltmeter. The constant positive wire is identi
-
fied by a reading of 12 V even when the vehicle
is turned off. After measuring connect cable
H
to the permanent positive terminal
(see fig. 3)
.
Note:
The yellow wires are connected ex fac-
tory.
If you are unable to identify the appropriate
wires please ask your dealer for help.
4b.
Direct power supply via the battery:
This wiring option has to be used if
“ HighPower” mode is activated!
It may also
be necessary if a subwoofer is connected to
the M 5DSP MK2 and the power supply of the
amplifier cannot provided via the vehicle cable
harness (max. 20A).
To do so disconnect joints (black, ground) and
(yellow, +12 V) of the PP-ISO cable harness
(
see page 28, fig. 4
4
). Next, the ground ca
-
ble (black, fig. 4
3
) 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 vehicle) or to
a prepared metal location on the vehicle chas
-
sis i.e. an area which has been cleaned of all
paint residues by using a power wire with a wire
gauge of min. 4 mm² / AWG 12.
Always dis-
connect the car battery’s negative terminal
before you execute the following steps.
Con-
nect the +12 V power cable (yellow, fig. 4
3
/
min. 4 mm² / AWG 12) to the positive terminal of
the battery. The positive wire from the battery to
the M 5DSP MK2 harness connection needs to
have a main fuse (min. 30 A) at a distance of no
more than 12 inches (30 cm) from the battery.
Insulate the now unused connections of th PP-
ISO cable harness (see fig. 4
4
) with tape or
other appropriate material.
Installation with PP-ISO cable
