Audiotec Fischer Helix A6 Competition Manuale di istruzioni - Pagina 3
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Stampa la pagina1 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. 16mm
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 ampe-
res, and both must be installed as the amplifier protec-
tion 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 out-
put of the line-outputs of the headunit or of a pre-ampli-
fier. This connectors are gold-plated to ensure a better
signal transmission.
6
12 - 17 Level controls for input sensitivity
These controls can be used to match the input sensitivi-
ty of the inputs 6 to 11 with the output voltage of the
connected head unit. These control is not a volume con-
trol and are solely intended for the purpose of sensitivi-
ty 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
2
.
If the amplifier shuts off due to overheating it can take a
while until it turns on again. This depends on the envi-
ronmental 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 spea-
ker. 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 chan-
nel.
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 con-
trolled innovative power supply.
This newly developed feature makes possible that the
amplifier reduces the output power at very high tempe-
rature. 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 defec-
tive power supply.
It is indicated through different LEDs (see CPS system
18-20).
Please check for connecting failures such as short-cir-
cuits, 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 chan-
nels CD.
We guarantee maximum enjoyment and unforgettable
listening experience with sufficient power if you follow
these instructions properly.