Owner's Manual

15
Initial start-up and functions
1
Line Input
2-channel lowlevel line input to connect signal
sourc es such as head units / radios / DSPs.
Important: It is strictly forbidden to use the High-
level Input and lowlevel Line Input at the same time.
This may cause severe damage to the lowlevel line
outputs of your head unit / car radio.
2
Highlevel Input
2-channel highlevel loudspeaker input to connect
the amplier directly to the loudspeaker outputs of
OEM / aftermarket radios that do not have any low-
level line outputs.
The Highlevel Input is equipped with our proprietary
ADEP circuit (Advanced Diagnostics Error Protec-
tion) which ensures that the car radio detects the
amplier as a speaker and thus neither any function
of the radio (e.g. fader) will be deactivated nor any
error log in the CPU of the car will be created. If this
input is used the remote input (REM) does not need
to be connected as the amplier will automatically
turn on once a loudspeaker signal is applied.
Attention: Solely use the pluggable screw-terminal
for the highlevel connector which is included in de-
livery!
Important: It is strictly forbidden to use the High-
level Input and lowlevel Line Input at the same time.
This may cause severe damage to the lowlevel line
outputs of your car radio.
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
amplier gain. The control range of the RCA / Line
Input (lowlevel) is 0.5 - 6 Volts and 1.1 - 13 Volts for
the Highlevel Input.
If the Highlevel Input is used in combination with a
standard car radio we recommend an input sensitiv-
ity of roughly 9 Volts. For this purpose, turn the
control from max. CCW position to 9 o’clock posi-
tion.
4
Phase Shift
This control is used to adjust the phase from 0° to
180°. This allows to match the phase of the sub-
woofer with the other speakers thus avoiding any
cancellations in the frequency response due to
phase shifts.
5
TwinPower Link switch
The HELIX M ONE X amplier can be connected
to a second M ONE X via the TwinPower Link by
which the output power is more than doubled, de-
pending on the speaker conguration. In order to
operate two ampliers in this mode, they must be
connected with a RCA / Cinch cable (see item 6;
Mono RCA/Cinch In- / Output). The amplier which
is set as “Master” assumes the complete control
(active crossover, bass boost etc.) for both amps.
All lter adjustments of the amplier which operates
in “Slave” mode will be deactivated.
Attention: Make sure that one amplier is adjusted
as “Master” and the other one as “Slave”. In this
mode the minimum speaker impedance is 2 Ohms.
Note: If the amplier operates individually the
TwinPower Link switch must be set to “Master”.
Examples for speaker congurations in TwinPower
Link mode can be found on page 22.
6
Mono RCA/Cinch In- / Output
This connector serves as signal in- or -output for
connecting a further M ONE X amplier in bridge
mode (see item 5; TwinPower Link switch).
7
Bass Boost Gain
This control is used to increase the adjusted bass
center frequency (see item 9) from 0 to 12 dB.