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1
Control pushbutton
The control pushbutton allows the user to switch
between the two setup memory positions. To switch
between the setups the button has to be pressed
and held for 1 second. Switching is indicated by
a single red flash of the Status LED. Pressing the
button for 5 seconds completely eras es the internal
memory. This is indicated by a constant flashing of
the Status LED.
Attention:
After erasing the setups from memory
the HELIX P SIX DSP will not reproduce any audio
output.
2
Status LED
The Status LED indicates the current active DSP
setup. Green means that setup 1 is load ed, orange
means that setup 2 is loaded. A flashing red light in
-
dicates that no setup is loaded. In that case please
load a new setup via the DSP PC-Tool software.
3
USB Input
Connect your personal computer to the P SIX DSP
using the provided USB cable. The required PC
software to configure this amplifier can be down
-
loaded from the Audiotec Fischer website
www.audiotec-fischer.com.
Please note:
It is not possible to connect any USB
storage devices.
4
Control Input
This multi-functional input is designed for HELIX
P SIX DSP accessory products like a remote control
which allows to adjust several features of the signal
amplifier. Depending on the type of remote con
-
trol, at first its functionality has to be defined in the
“ Device Configuration Menu” of the DSP PC-Tool
software.
5
Optical Input
Optical input in SPDIF format for connecting signal
sources with a digital audio output. The sampling
rate of this input must be between 12 and 96 kHz.
The input signal is automatically adjusted to the in-
ternal sample rate. In order to control the volume of
this input, we recommend to use an optional remote
control.
Notice:
This amplifier can only handle stereo input
signals and no Dolby-coded digital audio stream.
6
Input Sensitivity
These potentiometers are used to adjust the input
sensitivity of the low- and highlevel inputs for the
individual stereo signals. This is not a volume con
-
trol, it´s only for adjusting the amplifier gain. The
control range of the RCA / Line input is 2 - 4 Volts
and 5 - 10 Volts for the Highlevel input. The input
sensitivity range can be changed by repositioning
jumpers inside the device.
Attention:
It is mandatory to properly adapt the in-
put sensitivity of the P SIX DSP to the signal source
in order to avoid damage to the amplifier.
7
Line Input
6-channel pre-amplifier input to connect sig
-
nal sourc es such as radios. Input sensitivity is
factory-set to 4 Volts (maximum CCW position). It
is possible to vary the sensitivity between 2 and
4 Volts for each channel pair. By repositioning a
jumper inside the device the sensitivity range can
be changed to 4 - 8 Volts.
8
Highlevel Input
6-channel highlevel loudspeaker input to connect
the amplifier directly to loudspeaker outputs of
OEM / aftermarket radios or OEM amplifiers that do
not have any pre-amplifier outputs. Input sensitivity
is factory-set to 10 Volts (maximum CCW position).
It is possible to vary the sensitivity between 5 and
10 Volts for each channel pair. By repositioning a
jumper inside the device the sensitivity range can
be changed to 10 - 20 Volts.
By changing the sensitivity range the input imped
-
ance of the highlevel inputs is shifted as well in or
-
der to guarantee a perfect operation in combination
with OE radios and high-power OE amplifiers. Input
impedance is set to 30 Ohms for a sensitivity range
Initial start-up and functions
