Audiotec Fischer HELIX Gebrauchsanweisung - Seite 3

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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. 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.

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

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.