HELIX V EIGHT DSP User manual

V EIGHT DSP
8-Kanal Verstärker mit integriertem DSP
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deutsch / english

15
Dear Customer,
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and high-quality HELIX product.
With the HELIX V EIGHT DSP, 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 V EIGHT DSP.
Yours,
AUDIOTEC FISCHER
General installation instructions for HELIX
components
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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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a proper performance and to ensure full warranty
FRYHUDJHZHVWURQJO\UHFRPPHQGWRJHWWKLVSURG-
uct installed by an authorized HELIX dealer.
Install your HELIX V EIGHT DSP in a dry location
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to a solid mounting surface using proper mount-
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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
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General instruction for connecting the HELIX
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terminal connected to the chassis ground. Any oth-
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current input of the car audio system.
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ble cross-section for the connection of HELIX
V EIGHT DSP. The fuses may only be replaced
by identically rated fuses (2 x 30 A) to avoid
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Prior to installation, plan the wire routing to
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All cabling should be protected against possible
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cables close to potential noise sources such as
electric motors, high power accessories and other
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Congratulations!
General instructions

Connectors and control units
@
@
16
USB Input
Connects the HELIX V EIGHT DSP to your
PC.
Control Input
Multifunction interface for e.g.
an
optional
remote control or other HELIX accessory.
0
Control pushbutton
Use this button to either switch between the
setups or initiate a reset
of
the device.
Status LED
This LED indicates the operating mode
of
the
DSP and which setup has been chosen.
Optical Input
Optical input for digital stereo signals (SPDIF
format).
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Output Channels
.
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Speaker outputs for connecting speaker
systems.
GND @
Connector for the ground cable (negative
terminal
of
the battery or metal body
of
the
vehicle).
REM
Connector for the remote cable.
+12
v
Connector for the +12 V power cable to the
@
.
®
Highlevellnput
Highlevel speaker inputs for connecting a
factory radio or
an
aftermarket radio without
pre-amp I line outputs.
Line Input
RCA inputs for connecting pre-amplifier
signals.
Clipping LED
This LED lights up
red
if one
of
the analog
inputs is overdriven.
Input Sensitivity
Control for adjusting the input sensitivity
of
the low- and highlevel inputs.
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positive terminal
of
the battery.
Line Output
Line outputs for connecting external
amplifiers. Make sure that the remote output
(Rem
Out) is used to turn on these devices.
Rem Out
The remote output has to be used to turn
on
/
off external amplifiers that are connected to
the RCA I Cinch line outputs. Both connec-
tions are internally wired
in
parallel.

17
1USB Input
Connect your personal computer to 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
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2Control Input
This multi-functional input is designed for HELIX
V EIGHT DSP accessory products like a remote
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software.
3Control 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
DVLQJOHUHGÀDVKRIWKHStatus LED. Pressing the
button for 5 seconds completely erases the internal
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the Status LED.
Attention: After erasing the setups from memory
the HELIX V EIGHT DSP will not reproduce any au-
dio output.
4Status LED
The Status LED LQGLFDWHV WKH FXUUHQW DFWLYH '63
setup. Green means that setup 1 is loaded, orange
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dicates that no setup is loaded. In that case please
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the LED starts blinking orange, the internal tem-
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er will be reduced to lower the temperature of the
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shut down until it has reached a safe temperature
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5Optical 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 adapted to the in-
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this input, we recommend to use an optional remote
control.
Notice:7KLVDPSOL¿HUFDQRQO\KDQGOHVWHUHRLQSXW
signals and no Dolby-coded digital audio stream.
6Highlevel Input
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10 Volts with control 9 (Input Sensitivity%\UHSR-
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range can be changed to 10 - 20 Volts.
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DQFHRIWKHKLJKOHYHOLQSXWVLVVKLIWHGDVZHOOLQRU-
der to guarantee a perfect operation in combination
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of 10 - 20 Volts.
Attention: Solely use the pluggable screw-terminal
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the HELIX accessory assortment!
Important: It is strictly forbidden to use the High-
level Input DQG SUHDPSOL¿HU LQSXWV Line Input DW
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7Line Input
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8Clipping LED
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or Highlevel InputsLVRYHUGULYHQ7KH/('KDVQR
IXQFWLRQLIWKHGHYLFHLVIHGZLWKGLJLWDOLQSXWVLJQDOV
,IWKLV/('OLJKWVXSUHGXFHWKHLQSXWVHQVLWLYLW\E\
using the control 9 (Input SensitivityXQWLOWKH/('
goes out.
Initial start-up and functions

9Input Sensitivity
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WKHORZDQGKLJKOHYHOLQSXWVWRWKHRXWSXWYROWDJH
RIWKHFRQQHFWHGVLJQDOVRXUFH7KLVLVQRWDYROXPH
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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
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Attention: It is mandatory to properly adapt the
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VRXUFHLQRUGHUWRDYRLGGDPDJHWRWKHDPSOL¿HU
10 Output Channels
Speaker outputs to connect speaker systems. The
impedance per channel must not be lower than
2 Ohms.
Important: We highly recommend to make the gen-
eral settings in the DSP PC-Tool software before
WKH ¿UVW VWDUWXS (VSHFLDOO\ LI WKH 9(,*+7'63
ZLOOEHXVHGWRGULYHIXOO\DFWLYHVSHDNHUV\VWHPVD
wrong setup can destroy your tweeters right away.
11 GND
The ground cable should be connected to a com-
mon ground reference point (this is located where
WKH QHJDWLYH WHUPLQDO RI WKH EDWWHU\ LV JURXQGHG
WRWKHPHWDO ERG\RIWKH YHKLFOHRUWRD SUHSDUHG
PHWDO ORFDWLRQ RQ WKH YHKLFOH FKDVVLV LH DQ DUHD
which has been cleaned of all paint residues. Rec-
ommended cross section: min. 16 mm² / AWG 6.
12 REM
The remote input has to be used to turn on/off the
V EIGHT DSP if the signal source which is connect-
ed to the Highlevel InputLVQRWDFWLYDWLQJWKH³DXWR-
PDWLFWXUQRQ´IXQFWLRQRULIWKHDPSOL¿HUVKDOORQO\
EHDFWLYDWHGGHDFWLYDWHGE\DUHPRWHVLJQDODSSOLHG
to the remote input. The remote lead should be con-
nected to the remote output / automatic antenna
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7KLV LV RQO\ DFWLYDWHG LI WKH KHDG XQLW LV VZLWFKHG
RQ7KXVWKHDPSOL¿HULVVZLWFKHGRQDQGRIIWRJHWK-
er with the head unit. This input needn´t to be as-
signed if the Highlevel InputLVXVHG7RGHDFWLYDWH
WKH³DXWRPDWLFWXUQRQ´IXQFWLRQUHDGWKHGHVFULSWLRQ
RQSDJHSRLQW³&RQ¿JXUDWLRQRIWKHUHPRWHLQ-
SXW´
13 +12 V
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minal of the battery. Recommended cross section:
min. 16 mm² / AWG 6.
14 Line Output
3URFHVVHG FKDQQHO SUHDPSOL¿HU RXWSXW ZLWK D
PD[LPXP RXWSXW YROWDJH RI  9ROWV 506 IRU FRQ-
QHFWLQJ DGGLWLRQDO SRZHU DPSOL¿HUV 3OHDVH PDNH
VXUH WKDW \RX DOZD\V WXUQ RQRII H[WHUQDO DPSOL-
¿HUV XVLQJ WKH UHPRWH RXWSXW Rem Out RI WKH
9(,*+7'63 1HYHU GLUHFWO\ FRQWURO WKH H[WHUQDO
amps by a signal from the ignition switch of your
car! Additionally this output will be turned off when
WKH ³3RZHU 6DYH 0RGH´ RI WKH DPSOL¿HU LV DFWLYH
The outputs can be assigned to any of the inputs as
desired using the DSP PC-Tool software.
15 Rem Out
We strongly recommend to use this output for turn-
LQJRQRIIDGGLWLRQDODPSOL¿HUVWKDWDUHFRQQHFWHGWR
the Line Output of the HELIX V EIGHT DSP. This is
HVVHQWLDOWRDYRLGDQ\LQWHUIHULQJVLJQDOV7KLVRXW-
SXWLVDFWLYDWHGDXWRPDWLFDOO\DVVRRQDVWKHERRW-
ing process of the DSP is completed. Additionally
WKLVRXWSXWZLOOEHWXUQHGRIIGXULQJWKH³3RZHU6DYH
0RGH´RUDVRIWZDUHXSGDWHSURFHVV
18
Initial start-up and functions

Installation
Connection of HELIX V EIGHT DSP to the head
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Caution: Carrying out the following steps will re-
quire special tools and technical knowledge. In or-
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DVN\RXUGHDOHUIRUDVVLVWDQFHLI\RXKDYHDQ\TXHV
tions and follow all instructions in this manual (see
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installed by an authorized HELIX dealer.
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 8VH WKH FRUUHFW FDEOH 5&$  FLQFK FDEOH WR
FRQQHFW WKHVH LQSXWV WR WKH SUHDPSOL¿HU 
ORZOHYHOFLQFKRXWSXWVRI\RXUFDUUDGLR(DFK
input can be assigned to any output using the
DSP PC-Tool software. The automatic turn-on
circuit does not work when using the pre-ampli-
¿HULQSXWV,QWKLVFDVHWKHUHPRWHLQSXWREM
KDV WR EH FRQQHFWHG WR DFWLYDWH WKH +(/,;
V EIGHT DSP.
Important: It is strictly forbidden to use the
Highlevel Input DQG SUHDPSOL¿HU LQSXWV Line
InputDWWKHVDPHWLPH7KLVPD\FDXVHVHYHUH
GDPDJHWRWKHSUHDPSOL¿HURXWSXWVRI\RXUFDU
radio.
2. Connecting the highlevel speaker inputs
 7KH KLJKOHYHO ORXGVSHDNHU LQSXWV FDQ EH FRQ-
nected directly to the loudspeaker outputs of an
OEM or aftermarket radio using appropriate ca-
bles (loudspeaker cables with 1 mm² / AWG 18
PD[
We recommend the following channel assign-
ment if a common car radio will be connected
WRWKHDPSOL¿HU
&KDQQHO$ )URQWOHIW
&KDQQHO% )URQWULJKW
&KDQQHO& 5HDUOHIW
&KDQQHO' 5HDUULJKW
$FWXDOO\LWLVQRWPDQGDWRU\WRXVHDOOKLJKOHYHO
speaker inputs. If only two channels will be con-
nected we recommend to use the channels A
and B.
Make sure that the polarity is correct. If one
RU PRUH FRQQHFWLRQV KDYH UHYHUVHG SRODULW\ LW
PD\ DIIHFW WKH SHUIRUPDQFH RI WKH DPSOL¿HU ,I
this input is used the remote input (REMGRHV
QRWQHHGWR EH FRQQHFWHGDVWKHDPSOL¿HU ZLOO
automatically turn on once a loudspeaker signal
LVUHFHLYHG
 $GMXVWPHQWRIWKHLQSXWVHQVLWLYLW\
Attention: It is mandatory to properly adapt
the input sensitivity of the V EIGHT DSP to
the signal source in order to avoid damage
WRWKHDPSOL¿HU
6HYHUDO DGMXVWPHQW H[DPSOHV DUH OLVWHG LQ WKH
table on page 22.
,I\RXZDQWWRFKDQJH WKHLQSXWVHQVLWLYLW\XVH
the control 9 (see page 18 point 9; Input Sen-
sitivityDW¿UVW7KHVHWWLQJRIWKHFRQWURODIIHFWV
ERWKWKHORZOHYHODQGWKHKLJKOHYHOLQSXWV
,I WKH H[ IDFWRU\ VHQVLWLYLW\ UDQJH RI WKH ORZ-
OHYHO LQSXW    9ROWV UHVS KLJKOHYHO LQSXW
   9ROWV PD\ QRW EH VXI¿FLHQW LW LV SRV-
sible to change it internally by repositioning
jumpers. Therefore dismantle the side panel
ZKHUH WKH 86% LQSXW LV ORFDWHG E\ UHPRYLQJ
the four screws (two Philipps head screws and
WZRDOOHQKHDG VFUHZV 1RZ\RXFDQSXOO RXW
the bottom plate and get access to the jumpers.
The long jumper (Jumper ASLQVDIIHFWVWKH
channels A - D and the short jumper (Jumper B,
SLQVWKHFKDQQHOV(DQG),QVLGHWKHGHYLFH
there are two plug positions for each Jumper.
7KHGLIIHUHQWSOXJSRVLWLRQVDUHH[SODLQHGLQWKH
following:
Overview plug-in positions:
Jumper A Jumper B
A2 B1A1 B2
19

Jumper positions:
([IDFWRU\MXPSHUSRVLWLRQV
Jum-
per
Posi-
tion
Value range
A1+LJKOHYHO$'±9ROWV
RCA A - D: 2 – 4 Volts
B1+LJKOHYHO()±9ROWV
RCA E - F: 2 – 4 Volts
-XPSHUSRVLWLRQVIRUH[WHQGHGDGMXVWPHQWUDQJH:
Jum-
per
Posi-
tion
Value range
A2+LJKOHYHO$'±9ROW
RCA A - D: 4 – 8 Volt
B2+LJKOHYHO()±9ROW
RCA E - F: 4 – 8 Volt
Important: To change the position of a jumper
LW KDV WR EH UHPRYHG E\ SXOOLQJ LW VWUDLJKW XS-
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-
IHFWO\ DGDSW WKH DPSOL¿HUV LQSXW VHQVLWLYLW\ WR
your audio source by using the control:
 'RQµWFRQQHFWDQ\DPSOL¿HUVRUORXGVSHDNHUV
to the outputs of the HELIX V EIGHT DSP
during this setup.
 7XUQRQWKHDPSOL¿HU
 $GMXVW WKH YROXPH RI \RXU UDGLR WR DSSUR[
  RI WKH PD[ YROXPH DQG SOD\EDFN D
N+]IXOOVFDOHWHVWWRQHG%YLD&'GULYH
4. If the Clipping LED already lights up, you
KDYHWRUHGXFHWKHLQSXWVHQVLWLYLW\YLDFRQ-
trol (Page 18 point 9; Input SensitivityXQWLO
the LED turns off.
 ,I WKH FRQWURO LV DOUHDG\ VHW WR PD[LPXP
CCW position then it will be necessary to
FKDQJHWKHVHQVLWLYLW\UDQJHE\UHSRVLWLRQLQJ
the internal jumper.
 ,QFUHDVHWKHLQSXWVHQVLWLYLW\E\WXUQLQJWKH
control clockwise until the LED lights up.
Now turn the control counterclockwise until
the Clipping LED turns off again.
4. Connecting a digital signal source
 ,I\RXKDYHDVLJQDOVRXUFHZLWKDQRSWLFDOGLJ-
LWDO RXWSXW \RX FDQ FRQQHFW LW WR WKH DPSOL¿HU
using the appropriate input.
 ,Q VWDQGDUG FRQ¿JXUDWLRQ WKH +(/,;
9(,*+7'63DXWRPDWLFDOO\DFWLYDWHVWKHXVHG
digital input if a digital audio signal is detect-
HG 7KLV IXQFWLRQ FDQ EH GHDFWLYDWHG YLD WKH
'63 3&7RRO VRIWZDUH $OWHUQDWLYHO\ \RX FDQ
PDQXDOO\DFWLYDWHWKHGLJLWDOLQSXWLI\RXDUHXV-
ing the optional remote control. The automatic
turn-on circuit does not work when the digital
input is used. Therefore it is mandatory to con-
nect the remote input (REM
Please note that it is possible to connect a
source to the digital input and the Highlevel In-
put or the Line Input at the same time.
Important: The signal of a digital audio source
normally does not contain any information
DERXWWKHYROXPHOHYHO.HHSLQPLQGWKDWWKLV
ZLOOOHDGWRIXOOOHYHORQWKHRXWSXWVRIWKH+(/,;
9(,*+7'63DQG\RXUFRQQHFWHGDPSOL¿HUV
7KLV PD\ FDXVH VHYHUH GDPDJH WR \RXU
speakers. We strongly recommend to use an
RSWLRQDOUHPRWHFRQWUROIRUDGMXVWLQJWKHYROXPH
OHYHORIWKHGLJLWDOVLJQDOLQSXW
Information: The HELIX V EIGHT DSP can
only handle uncompressed digital stereo
signals in PCM format with a sample rate be-
tween 12 kHz and 96 kHz and no Dolby-coded
signals.
5. Connection to power supply
Make sure to disconnect the battery before
installing the HELIX V EIGHT DSP!
&RQQHFWWKH9SRZHUFDEOHWRWKHSRVLWLYH
WHUPLQDO RI WKH EDWWHU\ 7KH SRVLWLYH ZLUH IURP
A1 B1
A2 B2
20
Installation

21
WKH EDWWHU\ WR WKH DPSOL¿HU SRZHU WHUPLQDOV
QHHGV WR KDYH DQ LQOLQH IXVH DW D GLVWDQFH RI
OHVV WKDQ  LQFKHV  FP IURP WKH EDWWHU\
7KH YDOXH RI WKH IXVH LV FDOFXODWHG IURP WKH
PD[LPXP WRWDO FXUUHQW GUDZ RI WKH ZKROH FDU
DXGLRV\VWHP9(,*+7'63 PD[$506
DW9SRZHUVXSSO\,I\RXUSRZHUZLUHVDUH
VKRUWOHVVWKDQP´WKHQDZLUHJDXJHRI
PPð $:*ZLOOEHVXI¿FLHQW,Q DOORWKHU
cases we strongly recommend gauges of 25 -
35 mm² / AWG 4 – 2!
The ground cable (same gauge as the +12 V
ZLUHVKRXOGEHFRQQHFWHGWRDFRPPRQJURXQG
reference point (this is located where the neg-
DWLYHWHUPLQDORIWKHEDWWHU\LVJURXQGHGWRWKH
PHWDO ERG\ RI WKH YHKLFOH RU WR D SUHSDUHG
PHWDO ORFDWLRQ RQ WKH YHKLFOH FKDVVLV LH DQ
area which has been cleaned of all paint res-
idues.
6. Connecting the remote input
The remote input (REMKDVWREHFRQQHFWHGWR
WKHUDGLRUHPRWHRXWSXWLIWKHDPSOL¿HUVSUHDP-
SOL¿HULQSXWVRUWKHOptical Input are solely used
as signal inputs. We do not recommend con-
WUROOLQJWKH UHPRWHLQSXWYLDWKHLJQLWLRQVZLWFK
WRDYRLGSRSQRLVHGXULQJWXUQRQRII
If the Highlevel Input is used this input does not
need to be connected as long as the car radio
has BTL output stages.
 &RQ¿JXUDWLRQRIWKHUHPRWHLQSXW
The V EIGHT DSP will be turned on automati-
cally if the Highlevel Input is used or if a signal
is applied to the remote input (REMWHUPLQDO
7KH³$XWR5HPRWH´VZLWFKDOORZVWRGHDFWLYDWH
the automatic turn-on feature.
7KHIHDWXUH VKRXOGEHGHDFWLYDWHGLIWKHUHDUH
e.g. disturbing noises while switching on/off the
DPSOL¿HU
Note: If the automatic turn-on function is deac-
WLYDWHGLWLVPDQGDWRU\WRXVHWKHUHPRWHLQSXW
WHUPLQDOWRSRZHUXSWKHDPSOL¿HU7KHKLJKOHYHO
signal will be ignored in this case.
Note:7KHDFWLYDWLRQRIWKHDPSOL¿HUYLDVSHDNHU
LQSXWLVDFWLYDWHGH[ZRUNV
7RGHDFWLYDWHWKHDXWRPDWLFWXUQRQIHDWXUH\RX
KDYHWRRSHQWKHGHYLFHDQGFKDQJHWKHSRVL-
WLRQRIWKH³$XWR5HPRWH´VZLWFK
Therefore dismantle the side panel (where the
86%LQSXWLVORFDWHGE\UHPRYLQJWKHWZR3KLO-
lips and two allen screws.
Now you can pull out the bottom plate and get
access to the switch. The switch is located near
E\WKH³%DODQFHG'XDO$XGLR7UDQVIRUPHU´VHH
PDUNLQJLQWKHIROORZLQJSLFWXUH
On: $FWLYDWLRQ YLD KLJKOHYHO VSHDNHU LQSXW LV
HQDEOHGH[ZRUNV
Off: $FWLYDWLRQ YLD KLJKOHYHO VSHDNHU LQSXW LV
disabled.
 &RQ¿JXUDWLRQRIWKHLQWHUQDO'63
7KH JHQHUDO DPSOL¿HU VHWWLQJV VKRXOG EH FRQ-
ducted with the DSP PC-Tool software before
XVLQJWKHDPSOL¿HUIRUWKH¿UVWWLPH
,JQRULQJ WKLV DGYLFH PD\ UHVXOW LQ GDPDJLQJ
WKHFRQQHFWHGVSHDNHUVDPSOL¿HUV(VSHFLDOO\
LI WKH 9(,*+7'63 ZLOO EH XVHG WR GULYH IXOO\
DFWLYHVSHDNHUV\VWHPVDZURQJVHWXSFDQGH-
stroy your tweeters right away.
Information about connecting the V EIGHT DSP
to a computer can be found on page 24.
9. Connecting the loudspeaker outputs
The loudspeaker outputs can be connected di-
UHFWO\ WR WKH ZLUHV RI WKH ORXGVSHDNHUV 1HYHU
connect any of the loudspeaker cables with the
chassis ground as this will damage your ampli-
¿HUDQG\RXUVSHDNHUV
Ensure that the loudspeakers are correctly con-
QHFWHG LQ SKDVH LH SOXV WR SOXV DQG PLQXV
WRPLQXV([FKDQJLQJSOXVDQGPLQXVFDXVHVD
total loss of bass reproduction. The plus pole is
indicated on most speakers. The impedance of

the speakers must not be lower than 2 Ohms.
10. Connecting the remote output
This output (Rem OutLVXVHGWRVXSSO\UHPRWH
VLJQDOV WR WKH H[WHUQDO DPSOL¿HUV$OZD\V XVH
this remote output signal to turn on the ampli-
¿HUVLQRUGHUWRDYRLGRQRIIVZLWFKLQJQRLVHV
22
Installation
([DPSOHVIRUDGMXVWLQJWKHLQSXWVHQVLWLYLW\
Source Which input? Position
Jumper A
Position
Jumper B
Position of
control 9
4-channel OEM radio
Up to 25 Watts RMS power each channel
+LJKOHYHO$' A1 Optional 0D[&&:
position
2(0UDGLRZLWKDGGLWLRQDOFKDQQHODPSOL¿HU
Up to 100 Watts RMS power each channel
+LJKOHYHO$' A2 Optional 0D[&&:
position
2(0UDGLRZLWKDGGLWLRQDOFKDQQHODPSOL¿HU
Up to 100 Watts RMS power each channel
+LJKOHYHO$) A2 B2 0D[&&:
position
4-channel aftermarket radio without
SUHDPSOL¿HURXWSXWV
Up to 25 Watts RMS power each channel
+LJKOHYHO$' A1 Optional 0D[&&:
position
4-channel aftermarket radio with
SUHDPSOL¿HURXWSXWV
9ROWVSUHDPSOL¿HURXWSXWYROWDJH
/RZOHYHO
RCA A-D
A1 Optional 0D[&:
position
4-channel aftermarket radio with
SUHDPSOL¿HURXWSXWV
9ROWVSUHDPSOL¿HURXWSXWYROWDJH
/RZOHYHO
RCA A-D
A1 Optional 0D[&&:
position
5/6-channel aftermarket radio with
SUHDPSOL¿HURXWSXWV
9ROWVSUHDPSOL¿HURXWSXWYROWDJH
/RZOHYHO
RCA A-F
A2 B2 0D[&&:
position

Installation with “Easy Plug Cable”
To simplify installation to an OEM or aftermarket
radio the HELIX V EIGHT DSP can also be con-
QHFWHGXVLQJWKHRSWLRQDO(DV\3OXJ&DEOH(3&
ZKLFKZLOOVXSSO\WKHDPSOL¿HUZLWKWKHORXGVSHDNHU
signals of the radio. No factory wires or plugs need
to be cut by using this connection method.
7KH (DV\ 3OXJ &DEOH XVHV WKH KLJKOHYHO LQSXWV
A - D.
Note: Never use the power supply cables of the
Easy Plug Cable. Always directly connect the
PDVVLYH VFUHZ WHUPLQDOV RI WKLV DPSOL¿HU WR
your car’s battery using appropriate wires.
Connection to an OEM radio is detailed below:
1. 2QFHWKHUDGLRKDVEHHQUHPRYHGE\XVLQJWKH
right tools disconnect the OEM harness from
WKHUDGLR &RQQHFWWKHYHKLFOHFDEOHMDFNFRQ-
nectors of the Easy Plug Cable. You may need
D VSHFLDO ,62DGDSWRU GHSHQGLQJ RQ YHKLFOH
W\SH,QRUGHUWRYHULI\SOHDVHFKHFNWKHDGDSWRU
database on the Audiotec Fischer homepage
ZZZDXGLRWHF¿VFKHUFRP.
2. Connect the cable plugs to the car radio.
3. &RQQHFW WKH KLJKOHYHO SOXJ SROH FRQQHFWRU
to the appropriate HELIX V EIGHT DSP in-
SXW7KHSRZHUVXSSO\SOXJSROHFRQQHFWRU
remains unused.
Note - Cars equipped with MOST bus:
In cars equipped with MOST bus structure it is
PDQGDWRU\WRXQSOXJWKH¿EHURSWLFFDEOHIURPWKH
original radio connector and insert it into the ISO
adaptor which has a dedicated recess for this.
23

Connection to a PC
It is possible to freely configure the HELIX
V EIGHT DSP 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 ten DSP channels. Prior to connecting
the amplifier to your
PC
visit our website and down-
load the latestversion
of
the DSP PC-Tool software.
Check from time to time for software updates.
You
will find the software and the respective user manu-
al on www.audiotec-fischer.com.
We strongly recommend to carefully read the user
manual (Sound Tuning Magazine) before using the
software for the first time
in
order to avoid any com-
plications and failures.
24
Important: Make sure that the amplifier is not con-
nected to your computer before the software and
USB driver are installed!
In
the following the most important steps how to
connect and the first start-up are described:
1. Download the latest version
of
the DSP
PC-Tool software (available on our website
www.audiotec-fischer.com) and install it on
you computer.
2. Connect the amplifier to your computer using
the USB cable that
is
included
in
delivery. Ifyou
have to bridge longer distances please use
an
active USB extension cable with integrated re-
peater and no passive extension.
3.
Turn on the amplifier and start the software after
the Status LED lights up green. The operating
software will be updated automatically to the
latest version
if
it
is not up-to-date.
4. Now you are able to configure your HELIX
V EIGHT DSP amplifier with our intuitive DSP
PC-Tool software. Nevertheless interesting and
useful hints can be found e.g.
in
our "Sound
Tuning Magazine", which can be downloaded
for free from our website.
Caution: We highly recommend to set the volume
of
you car radio to minimum position during first
start-up.Additionally no devices or speakers should
be connected to the amplifier until general settings
in
the DSP PC-Tool software have been made. Es-
pecially if the V EIGHT DSP will be used to drive
fully active speaker systems, a wrong setup can de-
stroy your tweeters right away.
G)
Load and save
@Main
menu
@
Channel configuration
@
Highpass filter
@
Lowpass filter
@
Time alignment
(j)
Output
level
@
Frequency graph
@
Range
of
frequency
graphs
@Equalizer
@
EQ fine adjustment

25
HELIX Extension Card slot (HEC slot)
,W LV SRVVLEOH WR H[WHQG WKH IXQFWLRQDOLW\ RI WKH
+(/,;9(,*+7'63DPSOL¿HUE\LQVHUWLQJDQRS-
WLRQDO+(/,;([WHQVLRQ&DUG+(&IRUH[DPSOHD
Bluetooth®Audio Streaming module, an additional
optical digital input or an AUX input.
7R LQVWDOO D +(/,; ([WHQVLRQ &DUG LW LV QHFHVVDU\
WRUHPRYHWKHVLGHSDQHORIWKH9(,*+7'63DQG
replace it by the new side panel that comes with the
HEC module.
Attention: Install the HEC module only in the
GHVLJQDWHG GHYLFH DQG LWV VSHFL¿F VORW 8VLQJ
the HEC module in other devices or slots can
result in damage of the HEC module, the ampli-
¿HUWKHKHDGXQLWFDUUDGLRRURWKHUFRQQHFWHG
devices!
Read in the following the steps how to install a HEC
module:
 )LUVWGLVFRQQHFWDOOFDEOHVIURPWKHGHYLFH
2. Dismantle the side panel where the USB input
LVORFDWHGE\UHPRYLQJWKHWZR3KLOOLSVDQGWZR
allen screws.
3. Pull out the bottom plate sideways.
4. Prepare the module for installing it into the de-
YLFH $Q\ IXUWKHU PRXQWLQJ LQIRUPDWLRQ ZLOO EH
IRXQGLQWKHLQVWUXFWLRQPDQXDORIWKHUHVSHFWLYH
HEC module.
 ,QVHUW WKH +(& PRGXOH LQWR WKH VSHFL¿F VORW
RIWKHGHYLFH ZKLFK LVPDUNHGLQWKH IROORZLQJ
picture.
6. Make sure that the HEC module is installed
properly and all pins are fully inserted into the
socket.
 5HLQVHUWWKHERWWRPSODWHDQG¿[WKHQHZVLGH
SDQHOZKLFKLVGHOLYHUHGZLWKWKH+(&PRGXOH
with the two Phillips and two allen screws.
8. Bolt the HEC module to the side panel. Precise
mounting information will be found in the in-
VWUXFWLRQPDQXDORIWKHUHVSHFWLYH+(&PRGXOH
 5HFRQQHFWDOOFDEOHVWRWKHGHYLFH
7XUQRQWKHDPSOL¿HU7KH+(&PRGXOHLVDXWR-
PDWLFDOO\GHWHFWHGE\WKHGHYLFHDQGWKH6WDWXV
LED of the HEC module lights up green.
 1RZ\RXDUHDEOHWRFRQ¿JXUHWKH+(&PRGXOH
in the DSP PC-Tool software.

26
3XUH&ODVV*'DPSOL¿HUWHFKQRORJ\
Audiotec Fischers proprietary Pure Class GD con-
FHSW WDNHV WKH HI¿FLHQF\ RI FRQYHQWLRQDO &ODVV'
DPSV WR WKH QH[W OHYHO %\ YDU\LQJ WKH LQWHUQDO
VXSSO\ YROWDJH GHSHQGLQJ RQ WKH DPSOL¿HU¶V LQSXW
VLJQDOV LGOH ORVVHV DUH VLJQL¿FDQWO\ UHGXFHG DQG
RYHUDOOHI¿FLHQF\LVFORVHWRPD[LPXPDWDQ\WLPH
So heat dissipation is almost negligible thus allow-
ing smallest heat sinks and most compact form fac-
tors. Besides that Pure Class GD amp outperforms
FRQYHQWLRQDO &ODVV ' GHVLJQV LQ WHUPV RI VRXQG
quality by implementing a fully differential signal
SDWKDQGLPSURYHGRXWSXW¿OWHUGHVLJQ
Smart highlevel input
The latest generation of OE car radios incorpo-
rates sophisticated possibilities of diagnosing the
FRQQHFWHGVSHDNHUV,IDFRPPRQDPSOL¿HUZLOOEH
KRRNHG XS IDLOXUH PHVVDJHV DQG ORVV RI VSHFL¿F
IHDWXUHVHJIDGHUIXQFWLRQTXLWHRIWHQDSSHDUV
but not with the V EIGHT DSP.
7KHQHZ$'(3FLUFXLW$GYDQFHG'LDJQRVWLFV(UURU
3URWHFWLRQDYRLGVDOOWKHVHSUREOHPVZLWKRXWORDG-
ing the speaker outputs of the OE radio during high
YROXPHVXQQHFHVVDULO\
Start-Stop capability
The switched power supply of the HELIX
V EIGHT DSP assures a constant internal supply
YROWDJHHYHQLIWKHEDWWHU\¶VYROWDJHGURSVWR9ROWV
during engine crank.
Power Save Mode
7KH3RZHU6DYH0RGHLVLQFRUSRUDWHGLQWKHEDVLF
VHWXS ,W DOORZV WR VLJQL¿FDQWO\ UHGXFH WKH SRZHU
consumption of the V EIGHT DSP and connected
DPSOL¿HUV RQFH WKHUH¶V QR LQSXW VLJQDO SUHVHQW IRU
more than 60 seconds. Please note that in many
XSWRGDWHFDUVZLWK³&$1´RUDQ\RWKHULQWHUQDOEXV
VWUXFWXUHVLWPD\KDSSHQWKDWWKHUDGLRUHPDLQV³LQ-
YLVLEO\´WXUQHGRQIRUXSWRPLQHYHQDIWHUOHDYLQJ
WKHFDU2QFHWKH³3RZHU6DYH0RGH³LVDFWLYHWKH
remote output (Rem OutDQGWKHLQWHUQDODPSOL¿HU
stages will be turned off. The HELIX V EIGHT DSP
ZLOO UHDFWLYDWH WKH UHPRWH RXWSXW DQG WKH LQWHUQDO
DPSOL¿HU VWDJHV ZLWKLQ D VHFRQG LI D PXVLF VLJQDO
is applied. It is possible to either modify the turn-off
WLPHRIVHFRUFRPSOHWHO\GHDFWLYDWHWKH³3RZHU
6DYH0RGH´YLDWKH'633&7RROVRIWZDUH
Automatic Digital Signal Detection
Switching from analog input to the digital input is
done automatically as soon as a signal is detect-
ed on the Optical Input. This feature can be deac-
WLYDWHG LQ WKH '63 3&7RRO VRIWZDUH$OWHUQDWLYHO\
you can use an optional remote control for manual
switching between analog and digital inputs.
Unique Features of the HELIX V EIGHT DSP

27
Output power RMS
- @ 4 Ohms .....................................................................75 Watts per channel (7+'1
- @ 2 Ohms .....................................................................120 Watts per channel (7+'1
Inputs...............................................................................[5&$&LQFK
  +LJKOHYHOVSHDNHULQSXW
  [2SWLFDO63',)N+]
  [5HPRWH,Q
,QSXWVHQVLWLYLW\................................................................RCA / Cinch 2 - 4 Volts or 4 - 8 Volts
  +LJKOHYHO9ROWVRU9ROWV
Outputs............................................................................[6SHDNHU
  [5&$&LQFK
  [5HPRWH2XW
2XWSXWYROWDJH5&$&LQFK.............................................3 Volts RMS
Frequency response........................................................20 Hz - 22,000 Hz
DSP resolution.................................................................64 Bit
DSP power ......................................................................0+]ELOOLRQ0$&RSHUDWLRQVVHFRQG
Sampling rate ..................................................................48 kHz
6LJQDOFRQYHUWHUV.............................................................A/D: BurrBrown
D/A: BurrBrown
Signal-to-noise ratio digital input .....................................G%$ZHLJKWHG
Signal-to-noise ratio analog input....................................G%$ZHLJKWHG
'LVWRUWLRQ7+'...............................................................< 0.015 %
Damping factor ................................................................> 70
Input impedance RCA / Cinch .........................................10 kOhms
,QSXWLPSHGDQFHKLJKOHYHO...............................................13 Ohms or 13 kOhms
2SHUDWLQJYROWDJH ............................................................9ROWVPD[VHFGRZQWR9ROWV
Additional features...........................................................Control Input, USB, HEC slot
'LPHQVLRQV+[:[' ..................................................[[PP[[³
The limited warranty comply with legal regulations.
)DLOXUHV RU GDPDJHV FDXVHG E\ RYHUORDG RU LP-
SURSHUXVHDUHQRWFRYHUHGE\WKHZDUUDQW\3OHDVH
UHWXUQWKHGHIHFWLYHSURGXFWRQO\ZLWKDYDOLGSURRI
of purchase and a detailed malfunction description.
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Technical Data
Warranty Disclaimer
Note:
³7KH 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
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