15
Installation
Connection of HELIX G ONE 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 pre-amplifier inputs
Use the correct cable (RCA / cinch cable) to
connect these inputs to the pre-amplifier /
lowlev el / cinch outputs of your car radio. It is
not mandatory to use both pre-amplifier inputs.
If only one channel will be connected use chan-
nel A and set the
Input Mode
switch to “1CH”.
When both channels will be used please choose
switch position “2CH” (see page 13 point 6;
In
put Mode
). The automatic turn-on circuit does
not work when using the pre-amplifier inputs. In
this case the remote input (
REM
) has to be con-
nected to activate the HELIX G ONE.
Important:
It is strictly forbidden to use the
Highlevel Input
and pre-amplifier inputs (
Line
Input
) at the same time. This may cause severe
damage to the pre-amplifier outputs of your car
radio.
2. Connecting the highlevel speaker inputs
The highlevel loudspeaker inputs can be con-
nected directly to the loudspeaker outputs of an
OEM or aftermarket radio using appropriate ca-
bles (loudspeaker cables with 1 mm² / AWG 18
max.).
Actually it is not mandatory to use both high-
level speaker inputs. If only one channel will be
connected we recommend to use the channel A
and set the
Input Mode
switch to “1CH”. When
both channels will be used please choose
switch position “2CH” (see page 13 point 6;
In
put Mode
). Make sure that the polarity is cor-
rect. If one connection has reversed polarity it
may affect the performance of the amplifier. If
this input is used the remote input (
REM
) does
not need to be connected as the amplifier will
automatically turn on once a loudspeaker signal
is applied.
3. Adjustment of the input sensitivity
Attention:
It is mandatory to properly adapt
the input sensitivity of the G ONE to the sig-
nal source in order to avoid damage to the
amplifier.
If you want to change the input sensitivity use
the
Input Level
control (see page 13 point 2;
In
put Level
). The setting of the control affects
both the lowlevel (
Line Input
) and the highlevel
speaker inputs (
Highlevel Input
)! If the
High
level Input
is used with a standard car radio we
recommend an input sensitivity of roughly 9
Volts - turn the control from min position to 1/3
position - 11 o’clock position.
4. Connecting the loudspeaker outputs
The loudspeaker outputs can be connected
directly to the wires of the loudspeakers.
Note:
Outputs are wired in parallel internally.
This means that both plus outputs (+) resp.
both minus outputs (-) deliver the same output
signal.
Never connect any of the loudspeaker cables
with the chassis ground as this will damage
your amplifier and your speakers.
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.
16
Output Channel
Speaker outputs to connect a subwoofer. The min-
imum load impedance should not be lower than
1 Ohm.
