Full Text Searchable PDF User Manual
P SIX DSP
MK2
6-Kanal Verstärker mit integriertem DSP
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deutsch / english
15
Dear Customer,
Congratulations on your purchase of this innovative
and high-qual ity HELIX product.
With the HELIX P SIX DSP MK2, Audiotec Fischer
is setting new standards in the range of digital
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We wish you many hours of enjoyment with your
new HELIX P SIX DSP MK2.
Yours,
AUDIOTEC FISCHER
General installation instructions for HELIX
components
To prevent damage to the unit and possible injury,
read this manual carefully and follow all installation
instructions. This product has been checked for
proper function prior to shipping and is guaranteed
against manufacturing defects.
Before starting your installation, disconnect
the battery’s negative terminal to prevent
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For
a proper performance and to ensure full warranty
coverage, we strongly recommend to get this prod-
uct installed by an authorized HELIX dealer.
Install your HELIX P SIX DSP MK2 in a dry loca-
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to a solid mounting surface using proper mount-
ing hardware. Before mounting, carefully examine
the area around and behind the proposed instal-
lation location to insure that there are no electrical
cables or components, hydraulic brake lines or any
part of the fuel tank located behind the mounting
surface. Failure to do so may result in unpredictable
damage to these components and possible costly
repairs to the vehicle.
General instruction for connecting the HELIX
36,;'630.DPSOL¿HU
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installed in vehicles which have a 12 Volts / 24 Volts
negative terminal connected to the chassis ground.
Any other system could cause damage to the am-
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positive cable from the battery for the complete
system should be provided with a main fuse at a
distance of max. 30 cm from the battery. The val-
ue of the fuse is calculated from the maximum total
current input of the car audio system.
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-
ble cross-section for the connection of HELIX
P SIX DSP MK2. The fuses may only be replaced
by identically rated fuses (3 x 25 A) to avoid
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Prior to installation, plan the wire routing to
avoid any possible damage to the wire harness.
All cabling should be protected against possible
crushing or pinching hazards. Also avoid routing
cables close to potential noise sources such as
electric motors, high power accessories and other
vehicle harnesses.
Congratulations!
General instructions
16
Connectors and control units
1
Control pushbutton
Use this button to either switch between the
setups or initiate a reset of the device.
2
Status LED
This LED indicates the operating mode of the
DSP and which setup has been chosen.
3
USB Input
Connects the HELIX P SIX DSP MK2 to your
PC.
4
Control Input
Multifunction interface for e.g. an optional re-
mote control or other HELIX accessory.
5
Optical Input
Optical input for digital stereo signals (SPDIF
format).
6
Input Sensitivity
Controller for adjusting the input sensitivity of
the low- and highlevel inputs for the individu-
al stereo signals.
7
Line Input
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-
nals.
8
Highlevel Input
Highlevel speaker inputs for connecting a
factory radio or an aftermarket radio without
pre-amp / line outputs.
9
Output Channels A - D
Speaker outputs A - D for connecting speak-
er systems. The channels A and B may not
be loaded with more than 4 Ohms, all other
channels are 2 Ohms stable.
10
Clipping LED
This LED lights up red if one of the analog
inputs is overdriven.
11
Fuse
This LED lights up red if a fuse is faulty in the
device.
12
GND
Connector for the ground cable (negative
terminal of the battery or metal body of the
vehicle).
13
REM
Connector for the remote cable.
14
+12 V / +24 V
Connector for the +12 V / +24 V power cable
to the positive terminal of the battery.
15
Line Output
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-
ers. Make sure that the remote output (
Rem
Out
) is used to turn on these devices.
16
Rem Out
The remote output has to be used to turn on/
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the RCA line outputs. Both connections are
internally wired in parallel.
17
Output Channels E - F
Speaker outputs E and F for connecting
speaker systems. These channels are
2 Ohms stable.
p
p
p
9
10 11
12 13 14
15
16
17
1
4
3
2
5
6
7
8
17
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
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Status LED
. Pressing the
button for 5 seconds completely eras es the internal
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the
Status LED
.
Attention:
After erasing the setups from memory
the HELIX P SIX DSP MK2 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
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-
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 MK2 using the provided USB cable. The
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be downloaded from the Audiotec Fischer website
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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 MK2 accessory products like a remote
control which allows to adjust several features of
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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:
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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-
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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 MK2 to the signal
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7
Line Input
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-
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
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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
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impedance is set to 13 Ohms for a sensitivity range
Initial start-up and functions
of 5 - 10 Volts and 64 kOhms for a sensitivity range
of 10 - 20 Volts.
Attention:
Solely use the pluggable screw-terminal
for the highlevel connector which is included in de-
livery!
9
Output Channels A - D
These connections serve as speaker outputs of
the channels A - D. Never connect any of the loud-
speaker cables with the car chassis ground. It dam-
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systems are correctly connected (phase), i.e. plus
to plus and minus to minus. Exchanging plus and
minus causes a total loss of bass reproduction. The
plus pole is indicated on most speakers. The imped-
ance of the speakers of the channels A and B must
not be lower than 4 Ohms. All other channels can
be loaded with a minimum of 2 Ohms.
10
Clipping LED
This LED lights up red if one of the six
Line Inputs
or
Highlevel Inputs
is overdriven. The LED has no
function if the device is fed with digital input signals.
If this LED lights up reduce the input sensitivity by
using the potentiometers until the LED goes out.
11
Fuse
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the internal fuses the LED lights up red. During nor-
mal operation this LED will remain off.
12
GND
The ground cable should be connected to a com-
mon ground reference point (this is located where
the negative terminal of the battery is grounded
to the metal body of the vehicle) or to a prepared
metal location on the vehicle chassis i.e. an area
which has been cleaned of all paint residues. Rec-
ommended cross section: min. 16 mm² / AWG 6.
13
REM
The remote lead should be connected to the remote
output / automatic antenna (aerial positive) output
of the head unit/car radio. This is only activated if
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switched on and off with the head unit. This input
must not be assigned if the
Highlevel Input
is used.
14
+12 V / +24 V
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supply voltage. Connect the power cable to the pos-
itive terminal of the battery. Recommended cross
section: min. 16 mm² / AWG 6.
15
Line Output
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-
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The outputs can be assigned to any of the inputs as
desired using the DSP PC-Tool software. If you use
this output it is mandatory to turn on/off the external
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Rem Out
in order to avoid any pop
noise.
16
Rem Out
We strongly recommend to use this output for turn-
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to the
Line Outputs
of the HELIX P SIX DSP MK2.
This is essential to avoid any interfering signals.
This output is activated automatically as soon as
the booting process of the DSP is completed. Ad-
ditionally this output will be turned off during the
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17
Output Channels E - F
These connections serve as speaker outputs for the
channels E - F. Never connect the loudspeaker ca-
bles with the car chassis ground. It damages your
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correctly connected (phase), i.e. plus to plus and
minus to minus. Exchanging plus and minus causes
a total loss of bass reproduction. The plus pole is
indicated on most speakers. Output channels E and
F can be loaded with a minimum of 2 Ohms.
18
Initial start-up and functions
Installation
Connection of HELIX P SIX DSP MK2 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 13). It is recommended that this unit will be
installed by an authorized HELIX dealer.
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Use the correct cable (RCA / cinch cable) to
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lowlev el / cinch outputs of your car radio. Each
input can be assigned to any output using the
DSP PC-Tool software. The automatic turn-on
circuit does not work when using the pre-ampli-
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REM
)
has to be connected to activate the
HELIX
P SIX DSP MK2.
Important:
It is strictly forbidden to use the
Highlevel Input
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Line
Input
) at the same time. This may cause severe
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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.). It is not mandatory to use all speaker
inputs. Make sure that the polarity is correct. If
one or more connections have reversed polarity
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this input is used the remote input (
REM
) does
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automatically turn on once a loudspeaker signal
is received.
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Attention:
It is mandatory to properly adapt the
input sensitivity of the P SIX DSP MK2 to the
signal source in order to avoid damage to the
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If you want to change the
Input Sensitivity
use
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the potentiometers affects both the lowlevel and
the highlevel inputs!
If the ex factory sensitivity range of the low-
level input (2 - 4 Volts) resp. highlevel input
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to change it internally by repositioning jumpers.
In that case you have to open the device. Re-
move the ten Phillips head screws of the bot-
tom plate to get access to the jumpers. The long
jumper (
Jumper A
, 16-pins) affects the channels
A - D and the short jumper (
Jumper B
, 8-pins)
the channels E and F. Inside the device there
are two plug positions (
A1
and
A2
) for Jumper A
and three (
B1
,
B2
and
B3
) for Jumper B.
The different plug positions are explained on
page 20:
19
Overview plug-in positions:
Jumper positions:
Ex factory jumper positions:
Jum-
per
Posi-
tion
Value range
A
1
Highlevel A - D: 5 – 10 Volts
RCA
A - D: 2 – 4 Volts
B
1
Highlevel E - F: 5 – 10 Volts
RCA
E - F: 2 – 4 Volts
20
([DPSOHVIRUDGMXVWLQJ
Source
Which input?
Position
Jumper A
Position
Jumper B
Potentiome-
ter position
4-channel OEM radio
Up to 25 Watts RMS power each channel
Highlevel A-D
A1
Optional
Max. CCW
position
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Up to 100 Watts RMS power each channel
Highlevel A-D
A2
Optional
Max. CCW
position
2(0UDGLRZLWKDGGLWLRQDOFKDQQHODPSOL¿HU
Up to 100 Watts RMS power each channel
Highlevel A-F
A2
B2
Max. CCW
position
4-channel aftermarket radio without
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Up to 25 Watts RMS power each channel
Highlevel A-D
A1
Optional
Max. CCW
position
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outputs
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Lowlevel /
RCA A-D
A1
Optional
Max. CW
position
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outputs
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Lowlevel /
RCA A-D
A1
Optional
Max. CCW
position
5/6-channel aftermarket radio with pre-ampli-
¿HURXWSXWV
9ROWVSUHDPSOL¿HURXWSXWYROWDJH
Lowlevel /
RCA A-F
A2
B2
Max. CCW
position
Using the inputs E and F as an AUX input in the case of radios with four output channels
Smartphones, Tablets, MP3-Player, mobile
navigation systems, etc.
Lowlevel /
RCA E-F
See
above
B3
Max.CCW
position
Jumper A
Jumper B
A1
B1
A1
B1
A2
B3 B2
Installation
21
Jumper positions for extended adjustment range:
Jum-
per
Posi-
tion
Value range
A
2
Highlevel A - D: 10 – 20 Volt
RCA
A - D: 4 – 8 Volt
B
2
Highlevel E - F: 10 – 20 Volt
RCA
E - F: 4 – 8 Volt
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E and F can also be changed to connect even
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voltage (like smartphones) by repositioning
jumper B. The input sensitivity is adjustable
from 170 mV to 340 mV if jumper B is inserted
into the marked position in the picture below.
AUX jumper position for RCA inputs E and F:
Jum-
per
Posi-
tion
Value range
B
3
RCA E – F: 170 mV – 340 mV
Important:
To change the position of a jumper
it has to be removed by pulling it straight up-
wards. Make sure that the jumper is reinsert-
ed properly and all pins are fully inserted. The
position of each jumper can be changed inde-
pendently.
Follow the subsequent steps if you like to per-
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your audio source by using the potentiometers:
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-
speakers to the outputs of the HELIX
P SIX DSP MK2 during this setup.
2. Adjust the volume of your radio to approx.
90 % of the max. volume and playback a
1 kHz full scale test tone (0 dB) via CD
drive.
3. The adjustment will be easier when you
connect and adjust one input channel after
each other.
4. If
the
Clipping LED
already lights up, you
have to reduce the input sensitivity via
the respective potentiometer until the LED
turns off.
If the potentiometer is already set to maxi-
mum CCW position then it will be necessary
to change the sensitivity range by reposi-
tioning the internal jumper.
5. Increase the input sensitivity by turning the
respective potentiometer clockwise until the
LED lights up. Now turn the potentiometer
counterclockwise until the
Clipping LED
turns off again.
6. Repeat this process for each channel pair
you are using.
4. Connecting a digital signal source
If you have a signal source with an optical digital
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the appropriate input.
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FRQ¿JXUDWLRQ
WKH
+(/,;
P SIX DSP MK2 automatically activates the
used digital input if a digital audio signal is de-
tected. This function can be deactivated via the
DSP PC-Tool software. Alternatively you can
manually activate the digital input if you are us-
ing the optional remote control. The automatic
turn-on circuit does not work when the digital in-
put is used. Therefore it is mandatory to connect
the remote input (
REM
).
Please note that it is possible to connect a
source to the digital input and the highlevel or
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Important:
The signal of a digital audio source
normally does not contain any information
about the volume level. Keep in mind that this
will lead to full level on the outputs of the HELIX
36,;'630.DQG\RXUFRQQHFWHGDPSOL¿HUV
This may cause severe damage to your speak-
ers. We strongly recommend to use an optional
remote control for adjusting the volume level of
the digital signal input!
B3
A2
B2
Information:
The HELIX P SIX DSP MK2 can
only handle uncompressed digital stereo sig-
nals in PCM format with a sample rate between
12 kHz and 96 kHz. Neither Dolby-coded sig-
nals nor compressed MP3-/WMA- or AAC-audio
formats will be accepted.
5. Connection to power supply
Make sure to disconnect the battery before
installing the HELIX P SIX DSP MK2!
Connect the +12 V / 24 V power cable to the
positive terminal of the battery. The positive wire
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needs to have an inline fuse at a distance of
no more than 12 inches (30 cm) from the bat-
tery. The value of the fuse is calculated from the
maximum total current input of the whole car au-
GLRV\VWHP36,;'630. PD[$506
at 12 V RMS, max. 30 A RMS at 24 V power
supply). If your power wires are short (less than
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-
ly recommend gauges of 25 - 35 mm² / AWG
4 – 2! The ground cable (same gauge as the
+12 V / +24 V wire) should be connected to a
common ground reference point (this is locat-
ed where the negative terminal of the battery is
grounded to the metal body of the vehicle), or to
a prepared metal location on the vehicle chas-
sis, 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
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-
SOL¿HU LQSXWV DUH XVHG DV VLJQDO LQSXWV :H GR
not recommend controlling the remote input via
the ignition switch to avoid pop noise during turn
on/off.
If the
Highlevel Inputs
are used this input does
not need to be connected as long as the car ra-
dio has BTL output stages.
7. Connecting the remote output
This output (
Rem Out
) is used to supply remote
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this remote output signal to turn on the ampli-
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22
Installation
Installation with “Easy Plug Cable”
To simplify installation to an OEM or aftermar-
ket radio the HELIX P SIX DSP MK2 can also be
connected using the optional Easy Plug Cable
(EPC 5.2 - art.-no. HZ45000) which will supply the
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No factory wires or plugs need to be cut by using
this connection method.
The Easy Plug Cable uses the highlevel inputs
A - D.
Note: Never use the power supply cables of the
Easy Plug Cable. Always directly connect the
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your car’s battery using appropriate wires.
Connection to an OEM radio is detailed below:
1. Once the radio has been removed by using the
right tools disconnect the OEM harness from
the radio. Connect the vehicle cable jack con-
nectors of the Easy Plug Cable. You may need
a special ISO-adaptor depending on vehicle
type. In order to varify please check the adaptor
database on the Audiotec Fischer homepage
ZZZDXGLRWHF¿VFKHUFRP
2. Connect the cable plugs to the car radio.
3. Connect the highlevel plug (8-pole connector)
to the appropriate HELIX P SIX DSP MK2 input.
The power supply plug (4-pole connector) re-
mains unused.
Note - Cars equipped with MOST bus:
In cars equipped with MOST bus structure it is
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original radio connector and insert it into the ISO
adaptor which has a dedicated recess for this.
23
24
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P SIX DSP MK2 with our DSP PC-Tool software.
The user interface is designed for easy handling of
all functions and allows an individual adjustment of
each of the 8 DSP channels. Prior to connecting the
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-
load the latest version of the DSP PC-Tool software.
Check from time to time for software updates.
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manual on
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.
We strongly recommend to carefully read the user
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order to avoid any complications and failures.
Important:
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-
nected to your computer before the software and
USB driver are installed!
To install the software follow the next steps:
1. Download the DSP PC-Tool software from the
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2. Install the software on your computer. During
that process the required USB driver will be au-
tomatically installed as well.
3. After the software installation process is com-
SOHWHG \RX FDQ QRZ FRQQHFW WKH DPSOL¿HU WR
your PC with the provided USB cable. Don’t
extend the supplied cable by using any passive
USB extension cable. If you need to cover lo ng-
er distances between your PC and the HELIX
P SIX DSP MK2 then use an active USB repeat-
er cable.
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-
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will automatically be updated.
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P SIX DSP MK2 according to your demands.
Comprehensive operating instructions
for the software can be downloaded from
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Caution:
We strongly recommend not to connect
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-
puts of the HELIX P SIX DSP MK2 before the basic
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Ignoring this advice may result in damaging the
connected speakers, especially if you are running a
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Connection to a PC
1
Load and save
2
Main menu
3
Channel configuration
4
Highpass filter
5
Lowpass filter
6
Time alignment
7
Output level
8
Frequency graph
9
Range of frequency graphs
10
Equalizer
11
EQ fine adjustment
8
1
6
3
4
7
5
2
9
10
11
25
HELIX Extension Card slot (HEC slot)
It is possible to extend the functionality of the HELIX
P SIX DSP MK2 by inserting an optional HELIX
Extension Card (HEC) - for example a Bluetooth
®
Audio Streaming module, an additional optical digi-
tal input or an optical digital output.
To install a HELIX Extension Card it is necessary to
remove the bottom plate and one side panel of the
P SIX DSP MK2 and replace it by the new side pan-
el that comes with the HEC. Any further mounting
information will be found in the instruction manual
of the respective HELIX Extension Card.
HELIX Extension
Card slot
26
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96 kHz sampling rate
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at 96 kHz sampling rate. Therefore the audio band-
width is no longer limited to 22 kHz, but allows an
extended frequency response to more than 40 kHz.
The higher sampling rate has only been possible
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sets.
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-
dented sound quality.
Ready for 24 V
It is possible to operate the P SIX DSP MK2 with a
supply voltage of 12 Volts or 24 Volts (e.g. as usual
in trucks) without the need to make any changes
to the unit.
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equal performance characteristics. This guarantees
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Power Save Mode
The Power Save Mode is incorporated in the ba-
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consumption of the P SIX DSP MK2 and connected
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more than 60 seconds. Please note that in many
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bus structures it may happen that the radio remains
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active the remote output (
Rem Out
) and the inter-
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P SIX DSP MK2 will reactivate the remote output
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music signal is applied. It is possible to either mod-
ify the turn-off time of 60 sec. or completely deacti-
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software.
Start-/Stop capability
The switched power supply of the HELIX
P SIX DSP MK2 assures a constant internal supply
voltage even if the battery’s voltage drops to 6 Volts
during engine crank.
Automatic Digital Signal Detection
Switching from analog input to the digital input is
done automatically as soon as a signal is detect-
ed on the
Optical Input
. This feature can be deac-
tivated in the DSP PC-Tool software. Alternatively
you can use an optional remote control for manual
switching between analog and digital inputs.
Unique Features of the HELIX P SIX DSP MK2
27
RMS power
- Channel A - F @ 4 Ohms ..............................................120 Watts per channel (
1% THD+N)
- Channel C - F @ 2 Ohms ..............................................230 Watts per channel (
1% THD+N)
Inputs ...............................................................................6 x RCA / Cinch
6 Highlevel speaker input
1 x Optical SPDIF (12 - 96 kHz)
1 x Remote In
Inputs sensitivity ..............................................................RCA / Cinch 2 - 4 Volts or 4 - 8 Volts
Highlevel 5 - 10 Volts or 10 - 20 Volts
Outputs ............................................................................6 x Speaker
2 x RCA / Cinch
2 x Remote Out
Output voltage RCA .........................................................3 Volts RMS
Frequency response ........................................................20 Hz - 44,000 Hz
DSP resolution .................................................................64 Bit
DSP power ......................................................................295 MHz (1.2 billion MAC operations/second)
Sampling rate ..................................................................96 kHz
Signal converters .............................................................A/D: BurrBrown
D/A:
BurrBrown
Signal-to-noise ratio digital input .....................................105 dB (A-weighted)
Signal-to-noise ratio analog input ....................................100 dB (A-weighted)
Distortion (THD) ...............................................................< 0.008 %
Damping factor ................................................................> 100
Input impedance RCA / Cinch .........................................64 kOhms
Input impedance highlevel ...............................................13 Ohms or 64 kOhms
Operating voltage ............................................................10.5 - 32 Volts (max. 5 sec. down to 6 Volts)
Additional features ...........................................................Control Input, USB, HEC slot
Dimensions (H x W x D) ..................................................
[[PP[[³
The limited warranty comply with legal regulations.
Failures or damages caused by overload or improp-
er use are not covered by the warranty.
Please return the defective product only with a
valid proof of purchase and a detailed malfunction
description.
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Errors are reserved!
For damages on the vehicle and the device, caused
by handling errors of the device, we can’t assume
liability.
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European community (EC).
Technical Data
Warranty Disclaimer
Note:
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Bluetooth
®
word mark and logos are registered trademarks owned by Bluetooth SIG, Inc. and any use of such marks by
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Audiotec Fischer GmbH
Hünegräben 26 · D-57392 Schmallenberg
Tel.: +49 2972 9788 0 · Fax: +49 2972 9788 88
(PDLOKHOL[#DXGLRWHF¿VFKHUFRPā,QWHUQHWZZZDXGLRWHF¿VFKHUFRP