BEDIENUNGSANLEITUNG
INSTRUCTION MANUAL
MADE IN GERMANY by
Dear Customer,
congratulations on your purchase of this high-quality
HELIX amplifier, made in Germany. The new Helix
competition series amplifiers highlights best quality,
excellent manufacturing and state-of-the-art technology.
After 24 years of experiences in the research & development of audio products this amplifier generation sets
new standards. The attractive typical Helix design makes
this amplifier to an outstanding and top of the class product.
We wish you many hours of enjoyment with your new
HELIX amplifier.
Yours
AUDIOTEC FISCHER Team
General installation instructions for
HELIX amplifiers
To find out how HELIX amplifiers work best for you,
read this manual carefully and follow the instructions
for installation. We guarantee that this product has been
checked for proper functioning before shipping.
Before you start installation, disconnect the car battery
at the minus pole. We would urge you to have the installation work carried out by a specialist as verification of
correct installation and connection of the unit is a prerequisite for warranty cover of the HELIX amplifier.
Install your amplifier at a dry location where there is sufficient air circulation to ensure adequate cooling of the
equipment. For safety reasons, the amplifier must be
secured in a professional manner. This is performed by
means of four fixing screws screwed into a mounting
surface offering sufficient retention and stability.
Before drilling the holes for the screws, carefully
examine the area around the installation position and
make sure that there are no electrical cables or components, hydraulic brake lines or any part of the petrol tank
located behind the mounting surface - otherwise these
could be damaged. You should be aware of the fact that
such components may also be concealed in the doubleskin trim panels/mouldings.
General instruction for connecting the
amplifiers
The HELIX amplifiers may only be installed in motor
vehicles which have a 12-volt minus pole connected to
the chassis ground. Any other system could cause damage to the amplifier and the electrical system of the
vehicle.
The plus 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 value of the fuse is
calculated from the maximum total current input of the
car audio system.
Install the cabling in a manner which precludes any danger of the leads being exposed to shear, crushing or
rupture forces. If there are sharp edges in the vicinity
(e.g. holes in the bodywork) all cables must be cushioned and protected to prevent fraying.
Never lay the power supply cables adjacent to leads and
lines connecting other vehicle equipment (fan motors,
fire detection modules, gas lines etc.).
In order to ensure safe installation, use only high-quality connections and materials. Ask your dealer for high
quality accessories.
Connecting the remote lead
Connecting the battery cable
Connecting the ground cable
Fuses 4 x 20 ampere
Fuse function indication
Signal inputs
Level controls for input sensitivity
300 mV - 8 V
CPS-Colour Protection System
green = in operation
yellow = technical failure
red = overheating
Switch for mono or stereo signal
Speaker terminals
front and rights
Speaker terminal
rear and right
Speaker terminal center speaker
Speaker terminal woofer
Control for subsonic filter
of woofer channel
1
2
3
4
5
6 - 11
12 - 17
18 - 20
21 - 23
24
25
26
27
28
ENGLISH
5
6
1 Connecting the remote lead
The remote lead is connected to the automatic antenna
(aerial positive) output of the head unit (radio). This is
only activated if the head unit is switched ON. Thus the
amplifier is switched on and off with the head unit.
2 Connecting the battery cable
Connect the +12 V power cable to the positive terminal
of the battery. Recommended cross section: min. 16mm2.
3 Connecting the ground cable
The ground cable should be connected to a central ground
reference point (this is located where the negative terminal
of the battery is grounded at the metal body of the vehicle),
or to a bright bare-metal location on the vehicle chassis, i.e.
an area which has been cleaned of all paint residues.
4 Fuses
The input fuses are connected in parallel and provide
protection against an internal equipment fault, i.e. the
system must be additionally protected by a further line
fuse located in the vicinity of the battery (max. distance
from battery: 30 cm). The fuse ratings are 4 x 20 amperes, and both must be installed as the amplifier protection rating is 80 amperes (4 x 20 A).
5 Fuse Function Indication
If the fuses (4) are destroyed due to malfunction the red
LED (5) illuminates. In normal operation the LED turns
off.
6 - 11 Signal inputs
The A6 Competition has RCA connectors for RCA
cables that can be connected with the pre-amplifier output of the line-outputs of the headunit or of a pre-amplifier. This connectors are gold-plated to ensure a better
signal transmission.
12 - 17 Level controls for input sensitivity
These controls can be used to match the input sensitivity of the inputs 6 to 11 with the output voltage of the
connected head unit. These control is not a volume control and are solely intended for the purpose of sensitivity trimming. The control range extends from 500 mV to
8 V.
18 - 20 CPS - Color Protection System
This LEDs show the operation mode of the amplifier.
green (18) = in operation
yellow (19) = malfunction of the amplifier, short circuit
at loudspeaker output
red (20) = overheating
If the amplifier shuts off due to overheating it can take a
while until it turns on again. This depends on the environmental temperature.
21 - 23 Stereo/Bridged/Mono Schalter
To set the operating mode of the amplifier’s channel
pairs.
Stereo: For 2-channel operation of the front and rear
channel pairs, woofer and center the switch is in stereo
position (ex works) and the corresponding inputs (Front
A and B, Rear F and E and Woofer/Center C and D) are
connected.
Bridged: For mono operation of the channel pairs
switch to position „bridged“. In this mode both amplifier
channels (AB / CD / EF) are bridged to one channel
(mono). In „bridged“ position both channels (A and
B / C and D / E and F) must be connected.
Mono: As in position „bridged“ the channel pairs are are
switched to mono and bridged to one channel. In
„mono“ position only the inputs A (of AB), D (of CD)
and E (of EF) are connected. This is necessary when
only one mono signal is available.
24 Speaker terminals front and right
25 Speaker terminals rear and right
26 Speaker terminal center speaker
This terminal is designated to connect the center speaker. If the woofer is bridged (terminal 26 and 27), the
+ connector must be used as plus pole of the bridged
woofer channel.
In this case the subsonic filter (control 28) is activated
on this terminal.
27 Speaker terminal woofer
This terminal is designated to connect the woofer. It is
1 ohm stable. If the woofer is operated in bridged mode
(terminal 26 and 27), the
- connector of this terminal
must be used as minus pole of the bridged woofer channel.
28 Control for subsonic filter of woofer channel
To adjust the crossover frequency of the subsonic filter
from 15 Hz to 80 Hz. For woofer channel D only and
also when bridged with channel C.
Important Notice
The amplifier A6 Competition has a temperature controlled innovative power supply.
This newly developed feature makes possible that the
amplifier reduces the output power at very high temperature. It protects the amplifier from destruction and
overheating shut off. This power reduction is not audible
in normal application because it only comes into affect
at high power peaks and when the amplifier gets very
hot due to high outside temperatures. If the amplifier
shuts off due to overheating (> 95°C) it can take some
minutes until it turns on again.
Also due to the integrated safety electronic the amplifier
turns on with a delay of 3-4 seconds. This is because of
the internal check up of all relevant voltages that ensure
a perfect operation.
This amplifier has several electronic protection circuits
that shut off the amplifier at overheating, overloading,
short-circuit on loudspeaker, low-ohmic mode or defective power supply.
It is indicated through different LEDs (see CPS system
18-20).
Please check for connecting failures such as short-circuits, wrong connections and over-temperature. If the
amplifier does not turn on it is defect and has to be send
to your local authorized dealer for repair service.
A detailed description of the malfunction and the
purchase receipt has to be attached.
Never connect the loudspeaker cables with the car
chassis gound. It damages your amplifier
Ensure that the loudspeaker systems are correctly
connected (phase), i.e. plus to plus and minus to minus.
The plus pole is indicated on most speakers.
Important information for correct speaker
connection
The A6 competition is 2 ohms stable on channels AB
and EF and 1 ohm stable on channels CD. This means
that the connected impedance must double when bridged.
It is 4 ohms on channels AB and EF and 2 ohms on channels CD.
We guarantee maximum enjoyment and unforgettable
listening experience with sufficient power if you follow
these instructions properly.
ENGLISH
7
Due to the high quality standard Helix products achieved an excellent international reputation. Therefore we
grant a warranty period of 2 years.
The products are checked and tested carefully during the
entire production process. In the case of service note the
following:
1) The 2 years warranty period commences with the
purchase of the product and is applicable only to the
original owner.
2)
During the warranty period we will rectify any defects
due to faulty material or workmanship by replacing
or repairing the defective part at our decission.
Further claims, and in particular those for price
reduction, cancellation of sale, compensation for
damages or subsequential damages, are excluded.
The warranty period is not altered by the fact that we
have carried out warranty work.
3) Unauthorized tampering with the product will invalidate this warranty.
4) Consult your authorized dealer first, if warranty
service is needed. Should it be necessary to return the
product to the factory, please insure that
a) the product is packed in original factory packing in
good condition,
b) the warranty card has been filled out and attached to
the product,
c) the product is shipped prepaid, i.e. at your expense
and risk,
d) the receipt/invoice as proof of purchase is enclosed.
5) Excluded from the warranty are:
a) Shipping damages, either readily apparent or concea-
led (claims for such damages must be immediately
notified to the forwarding agent).
b) Scratches in metal parts, front panels or covers etc.
This must be notified to your dealer within 5 days of
purchase.
c) Defects caused by incorrect installation or connec-
tion, by operation errors, by overloading or by external force.
d) Products which have been repaired incorrectly or
modified or where the product has been opened by
other persons than us.
e) Consoquential damages to other equipments.
f) Reimbursement when repairing damages by third
parties without our previous permission.
Warranty RegulationTechnical Data A 6 Competition
Cont. power rating RMS 4 Ohms/12 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 x 60 Watts
Cont. power rating RMS/Music 4 Ohms/13,8 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 x 75/130 Watts
Cont. power rating RMS/Music 2 Ohms/13,8 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 x 125/215 Watts
Cont. power rating RMS/Music 4 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 x 220/350 Watts
Cont. power rating RMS/Music 2 Ohms bridged . . . . . . . . . . . . . . . . . . . . . . . .1 x 400/640 Watts Channel C and D
Cont. power rating RMS/Music 1 Ohm/13,8 V . . . . . . . . . . . . . . . . . . . . . . . . . .2 x 200/320 Watts Channel C and D
Frequency response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Hz - 20 kHz, +/- 0,3 dB
Total harmonic distortion (THD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 0,009%
TIM distortion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . < 0,016%
Damping factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 450
Signal to noise ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . > 100 dB
Input impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 kOhms
Input sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 mV - 8 V
Fuse . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 x 20 Ampere
Dimensions (H x W x D) in mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 x 240 x 500
Weight net. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5,5 kgs
AUDIOTEC FISCHER GMBH · Gewerbegebiet Lake II · Hünegräben 26 · D-57392 Schmallenberg
Tel.: ++49(0) 29 72-97 88 0 · Fax: ++49 (0) 29 72-97 88 88
E-mail: helix@audiotec-fischer.com · Internet: www.audiotec-fischer.com
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