If you connect two loudspeakers in parallel
ensure that they are correctly connected (in
phase), i.e. plus to plus and minus to minus. Ex-
changing plus and minus causes a total loss of
bass reproduction. The plus pole is indicated on
most speakers. The minimum load impedance
should not be lower than 1 Ohm, otherwise the
amplifier protection will be activated. Exam
-
ples of speaker configurations can be found on
page 16 and 17.
5. Connection to power supply
Make sure to disconnect the battery before
installing the HELIX G ONE!
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 (G ONE = max. 120 A RMS at
12 V power supply). If your power wires are
short (less than 1 m / 40”) then a wire gauge of
16 mm² / AWG 6 will be sufficient. In all other
cases we strongly recommend gauges of 25 -
35 mm² / AWG 4 – 2!
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.
6. Connecting the remote input
The remote input (
REM
) has to be connected to
the radio remote output if the amplifiers pre-am
-
plifier inputs are used as signal inputs. We do
not recommend controlling the remote input via
the ignition switch to avoid pop noise during
turn on/off.
If the
Highlevel Input
is used this input does not
need to be connected as long as the car radio
has BTL output stages.
16
Installation
Mono
Subwoofer with one voice coil (single voice coil)
Maximum output power of this configuration:
1 x 4 Ohms: 390 / 780 Watts
1 x 2 Ohms: 675 / 1350 Watts
1 x 1 Ohm: 920 / 1840 Watts
Examples of speaker configurations
