15
Installation
Connection of HELIX M SIX to the head unit / car
radio:
Caution:
Carrying out the following steps will re-
quire special tools and technical knowledge. In or-
der to avoid connection mistakes and / or damage,
ask your dealer for assistance if you have any ques-
tions and follow all instructions in this manual (see
page 11). It is recommended that this unit will be
installed by an authorized HELIX dealer.
1. Connecting the lowlevel line inputs
Use the correct cable (RCA / Cinch cable) to
connect these inputs to the lowlevel line outputs
of your head unit / car radio.
2. Adjustment of the input sensitivity
Attention:
It is mandatory to properly adapt
the input sensitivity of the M SIX to the sig-
nal source in order to avoid damage to the
amplifier.
If you want to change the input sensitivity of the
channel pairs use the three
Input
Level
controls
(see page 13, item 2;
Input Level
).
3. Connection to power supply
Make sure to disconnect the battery before
installing the HELIX M SIX!
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 to-
tal current draw of the whole car audio system
(M SIX = max. 70 A RMS at 12 V power supply).
If your power wires are short (less than 1 m /
40”) then a wire gauge of 10 mm² / AWG 8 will
be sufficient. In all other cases we strongly rec-
ommend gauges of 16 - 25 mm² / AWG 6 – 4!
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.
4. Connecting the remote input
The remote input (
REM
) has to be connected
to the radio remote output to switch the ampli-
fier on and off together with the head unit / car
radio. We do not recommend controlling the re-
mote input via the ignition switch to avoid pop
noise during turn on/off.
5. Connecting the loudspeaker outputs
The loudspeaker outputs can be connected
directly to the wires of the loudspeakers. Never
connect any of the loudspeaker cables to the
chassis ground as this will damage your ampli-
fier 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 positive
terminal is indicated on most speakers. The im-
pedance of each channel must not be less than
2 Ohms (4 Ohms in bridged mode), otherwise
the amplifier protection will be activated. Exam-
ples for speaker configurations can be found on
page 16 et sqq.
Summary of Contents for M SIX
Page 19: ...19 Notizen Notes ...
