16
Make sure that in Mono Mode the jumper is
plugged properly and all pins are fully inserted.
Afterwards you can reassemble the amplifier.
2. Connecting the pre-amplifier inputs
Use the included cable (see page 15, fig. 1)
to connect the M 2.1AMP to the pre-amplifier /
low level / cinch outputs of your signal source.
It is not mandatory to use both pre-amplifier in
-
put channels. In Mono Mode only input channel
A has to be used (see page 15, point 1). In this
case the input signal of channel A is supplied
to both output channels. In Stereo Mode both
speaker outputs are supplied with the corre-
sponding input signal. The currently activated
mode is indicated by the
Mono / Stereo Mode
LED
(see page 13, point 6).
3. Adjustment of the input sensitivity
Attention:
It is mandatory to properly adapt
the input sensitivity of the M 2.1AMP to the
signal source in order to avoid damage to
the amplifier.
If you want to change the input sensitivity use
the
Gain
control (see page 13, point 3). The
setting of the control only affects the
Line Input
!
Follow the subsequent steps if you like to per-
fectly adapt the amplifiers input sensitivity to
your audio source by using the
Gain
control:
1. Don‘t connect any loudspeakers to the out-
puts of the M 2.1AMP during this setup.
2. Turn on the amplifier.
3. Adjust the volume of your radio to approx.
90 % of the max. volume and playback an
appropriate test tone, e.g. pink noise (0 dB).
4. If the
Status LED
already lights up orange,
you have to reduce the input sensitivity via
Gain
control (see page 18, point 3) until the
LED turns green again.
5. Increase the input sensitivity by turning the
control clockwise until the LED lights up
orange. Now turn the control counterclock
-
wise until the
Status LED
turns green again.
4. Connecting the loudspeaker outputs
The loudspeaker outputs can be connected
to the wires of the loudspeakers by using the
pluggable screw-terminal which is included in
delivery. Never connect any of the loudspeaker
cables with the chassis ground as this will dam-
age your amplifier and your speakers.
Ensure that the loudspeakers are correctly con-
nected (in phase), i.e. plus to plus and minus
to minus. Exchanging plus and minus causes a
total loss of bass reproduction. The plus pole is
indicated on most speakers.
In Stereo Mode the impedance per speaker
must not be lower than 4 Ohms and in Mono
Mode the total impedance must not be lower
than 2 Ohms.
Examples of speaker configurations can be
found on page 17 f.
5. Connection to power supply
Make sure to disconnect the battery before
installing the MATCH M 2.1AMP!
Connect the +12 V power cable to the positive
terminal of the battery. The positive wire from
the battery to the amplifier power terminals
needs to have an inline fuse at a distance of
less than 12 inches (30 cm) from the battery.
The value of the fuse is calculated from the
maximum total current draw of the whole car
audio system (M 2.1AMP = max. 40 A RMS
at 12 V power supply). If your power wires are
short (less than 1 m / 40”) then a wire gauge of
4 mm² / AWG 12 will be sufficient.
The ground cable (same gauge as the +12 V
wire) should be connected to a common ground
reference point (this is located where the neg-
ative terminal of the battery is grounded to the
metal body of the vehicle), or to a prepared met
-
al location on the vehicle chassis, i.e. an area
which has been cleaned of all paint residues.
Attention:
For connection to power supply
solely use the pluggable screw-terminal which
is included in delivery (see page 15, fig. 2; Pow
-
er Input plug).
6. Connecting the remote input
The remote input (
REM IN
) has to be connected
to the remote output of the signal source.
We do not recommend controlling the remote
input via the ignition switch to avoid pop noise
during turn on / off.
Installation
