13
Initial start-up and functions
1
Input Ground Schalter
The signal ground of the M 2.1AMP signal inputs is
separated from the vehicle ground by a differential
amplifier (switch position = ISO). This is the best op
-
tion in most vehicles to prevent interference noise,
e.g. from the alternator.
Nevertheless, there are use cases where it will be
necessary to tie both grounds together (switch po-
sition = GND).
2
Status LED
The
Status LED
indicates the operating mode of the
amplifier.
Green:
Amplifier is ready for operation.
Orange:
One channel of the
Line Input
is overdriv
-
en. Reduce the input sensitivity via the
Gain
control
until the LED turns green.
Orange
flashing:
The internal fuse is destroyed.
Note:
The fuse may only be replaced by an identi-
cally rated fuse (30 A) to avoid damage of the am
-
plifier.
Red
flashing:
A malfunction has occurred. A mal-
function may have different causes as the MATCH
M 2.1AMP is equipped with different protection
circuits. These protections shut off the amplifier
in case of overheating, over- and undervoltage,
short-circuit on loudspeakers and false connection.
Please check for connecting failures such as
short-circuits, wrong connections, wrong adjust-
ments and over temperature.
If the amplifier does not turn on it is defective and
has to be send to your local authorized dealer for
repair service. A detailed description of the malfunc
-
tion and the purchase receipt has to be attached.
3
Gain
This control is used to adapt the input sensitivity to
the output voltage of the connected signal source.
This is not a volume control, it´s only for adjusting
the amplifier gain. The control range of the RCA /
Line Input
is 1 - 6 Volts (max. CCW = 6 Volts, max.
CW = 1 Volt).
4
Line Input
2-channel pre-amplifier input to connect signal
sourc es such as DSPs / DSP amplifiers.
Attention:
Solely use the Line Input connection
cable (see page 15, fig. 1) which is included in
delivery.
5
Speaker Output
Speaker outputs to connect speaker systems.
The M 2.1AMP is equipped with a Mono / Stereo
Mode. This allows to operate the amplifier as 1- or
2-channel amplifier. The Mono Mode is activated
by default. By removing a jumper inside the device
the Stereo Mode can be activated ( see page 15,
point 1).
Mono: In Mono Mode, both speaker outputs are
supplied with the input signal from channel A. The-
total impedance of the speakers must not be lower
than 2 Ohms.
Stereo: In Stereo Mode, each of the speaker out-
puts is supplied with the corresponding input signal.
In this mode, the impedance of the speakers must
not be lower than 4 Ohms.
The currently activated mode is indicated by the
Mono / Stereo Mode LED
(see the following point 6).
Achtung:
Solely use the pluggable screw-terminal
for the speaker output connector which is included
in delivery.
6
Mono / Stereo Mode (MSM) LED
This LED indicates the currently activated operat
-
ing mode of the
Speaker Output
. The Mono Mode
(1-channel) of the M 2.1AMP is activated by de
-
fault (LED = On). By removing a jumper inside the
unit, the amplifier can be switched to Stereo Mode
(2-channel / LED = Off). How to activate the mode
can be found on page 15 under point 1.
7
REM IN / OUT
This connector is used to connect the remote in-
and output.
IN:
The remote lead should be connected to the
remote output of the signal source. Thus the ampli-
fier is switched on and off together with the signal
source.
OUT: The signal of the remote input is looped
through to the remote output. This allows to switch
on further amplifiers.
Attention:
Solely use the pluggable screw-terminal
which is included in delivery.
8
+12 V
Connect the +12 V power cable to the positive ter
-
minal of the battery. Recommended cross section:
min. 6 mm² / AWG 10.
