38
To simplify installation to an OEM or aftermarket
radio the M 5.4DSP can also be connected using
optional Plug & Play cables from the MATCH ac-
cessory programm. The cables allow 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 5.4DSP must be connected di-
rectly 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 using
the PP-ISO cable harness as an example:
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. 4
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. 4
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 5.4DSP 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 5.4DSP,
we also recommend to use alternative 4b. Short
interrupts in music reproduction at high listen-
ing levels are an indicator for significant voltage
drops on the power supply due to insufficient
vehicle cable harness dimension.
4a.
Power supply via vehicle cable harness:
In this case the M 5.4DSP will be directly pow-
ered from the vehicle´s car radio harness. Care-
fully 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 terminal
and constant positive terminal can be inter-
changed. The M 5.4DSP must not be powered
using the switched positive terminal as this
might result in damage to the vehicle‘s elec-
tronic circuits. Verification of the right terminal
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. 4)
.
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 5.4DSP and the power supply of the amplifier
cannot provided via the vehicle cable harness
(max. 20 A).
To do so disconnect joints (black, ground) and
(yellow, +12 V) of the PP-ISO cable harness
(
see page 40, fig. 5
4
). Next, the ground ca-
ble (black, fig. 5
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. 5
3
/
min. 4 mm² / AWG 12) to the positive terminal
of the battery. The positive wire from the battery
to the M 5.4DSP 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. 5
4
) with tape or
other appropriate material.
Installation with a MATCH Plug & Play cable harness
