27
will be used to drive fully active speaker systems, a
wrong setup can destroy your tweeters right away.
12
Power & Protect LED
The power and protect LED indicates the operating
mode of the amplier.
Green: The amplier is ready for operation.
Red: A malfunction has occurred. The HELIX
M FOUR DSP is equipped with a protec-
tion circuit against over- and undervoltage.
Please check for connecting failures such -.
mncvxas short-circuits, wrong connections,
wrong adjustments and over temperature. If
the amplier does not turn on it is defective
and has to be sent to your local authorized
dealer for repair service. A detailed descrip-
tion of the malfunction and the purchase re-
ceipt has to be attached.
13
+ 12 V
Connect the +12 V power cable to the positive ter-
minal of the battery. Recommended cross section:
min. 10 mm² / AWG 8.
14
REM
The remote input has to be used to turn on / o the
M FOUR DSP if the signal source which is con-
nected to the Highlevel Input is not activating the
“automatic turn-on” function or if the amplier shall
only be activated / deactivated by a remote signal
applied to the remote input. The remote lead should
be connected to the remote output / automatic an-
tenna (aerial positive) output of the head unit / car
radio. This is only activated if the head unit is
switched on. Thus the amplier is switched on and
o together with the head unit. This input needn´t to
be assigned if the Highlevel Input is used. To deac-
tivate the “automatic turn-on” function read the de-
scription on page 26, item 10; Auto Remote.
15
GND
The ground cable 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 lo-
cation on the vehicle chassis i.e. an area which has
been cleaned of all paint residues. Recommended
cross section: min. 10 mm² / AWG 8.
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