HELIX P ONE Bedienungsanleitung Seite 15

Initial start-up and functions
1 Status LED
The Status LED indicates the operating mode of the
amplifier.
Green: The amplifier is ready for operation.
Yellow / green flashing: The overheat control
dynamically limits the output power and allows to
always achieve the maximum output power de-
pending on the temperature. Therefore the amplifier
will only shut down if the device reaches extreme
overheating.
Yellow: The amplifier is overheated. The internal
temperature protection shuts down the device until
it reaches a safe temperature level again.
Yellow flashing: The fuses inside the device are
blown. Please check the fuses and, if necessary,
replace them. They may only be replaced by identi-
cally rated fuses (4 x 30 Ampere) to avoid damage
of the amplifier.
Red: A malfunction has occurred that may have dif-
ferent root causes. The HELIX P ONE is equipped
with protection circuits against over- and undervolt-
age, short-circuit on loudspeakers and reverse con-
nection. Please check for connecting failures such
as short-circuits or other wrong connections. If the
amplifier does not turn on after that it is defective
and has to be sent to your local authorized dealer
for repair service.
2 Line Input
2-channel lowlevel line input to connect signal
sourc es such as head units / radios / DSPs.
3 Clipping LED
This LED lights up red if the input stage is overdriven.
If this LED lights up reduce the input sensitivity by
using the control 4 (Gain) until the LED goes out.
4 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 amplifier gain. The control range is 0.5 - 8 Volts.
The setting of the control also affects the digital sig-
nal input of the optionally available HDM 1 module
if the SPDIF Direct In switch is not set to "On" po-
sition.
5 Input Mode switch
This switch is used to adapt the amplifier to the
number of used inputs.
Stereo: Select this switch setting if both input chan-
nels (A and B) are used. In this mode an optimized
sum signal is generated by the input signals of the
channels A and B.
Mono: In mono operation only input channel A
needs to be connected e.g. the signal source only
provides a mono signal for subwoofer applications.
6 TwinPower Link switch
The HELIX P ONE amplifier can be connected to
a second P ONE via the TwinPower Link by which
the output power is more than doubled, depending
on the speaker configuration. In order to operate
two amplifiers in this mode, they must be connected
with a RCA / Cinch cable (see item 7; Mono RCA/
Cinch In- / Output).
Attention: Make sure that one amplifier is adjusted
as "Master" and the other one as "Slave". In this
mode the minimum speaker impedance is 2 Ohms.
Note: If the amplifier operates individually the Twin-
Power Link switch must be set to "Master".
Examples for speaker configurations in TwinPower
Link mode can be found on page 21.
7 TwinPower signal link
This connector serves as signal in- or -output for
connecting a further P ONE amplifier in bridge
mode (see item 6; TwinPower Link switch).
8 SPDIF Direct In switch (optional)
The SPDIF Direct In switch allows to bypass the
input stages of the P ONE so that the input signal
of the Optical Input is directly and losslessly rout-
ed from the integrated DA converter to the internal
power stage. To activate the direct signal routing
you have to set the SPDIF Direct In switch to "On".
Please note: The SPDIF Direct In function is not
part of the P ONEs standard equipment. It is solely
included in the optionally available HELIX Digital In-
put Module HDM 1.
Note: This switch only affects the signal routing of
the Optical Input.
Note: If the switch is set to "On" position the lowlev-
el Line Input (2) as well as the Gain control (4) are
without function!
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