Bedienungsanleitung Teufel System 4 (Seite 15 von 16) (Englisch)

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· System 4

The subwoofer is not working

If the Power LED on the rear

panel does not light up, re-

place the fuse (see page 14,

point 11).

If the Power LED lights up,

set the subwoofer volume

level to “Min”,

unplug the

subwoofer RCA cable from the amplifier,

turn up

the volume slightly and touch the tip of the RCA

connector with your finger. If this produces a hum

or crackle, the fault is with the amplifier or the

amplifier

settings. If the subwoofer remains com-

pletely silent, please contact our support team.

The subwoofer is making a humming noise

Hum may be caused by any connected audio de-

vice as well as by problems with the mains power.

In most cases, excessive hum is caused by one of

the following:

The subwoofer is connected to a different

electrical circuit

than the other components.

Make sure that all the connected devices (in-

cluding any computers) are powered from the

same electrical circuit, i.e., the same mains

socket.

2. The antenna connected to the audio sys-

tem or TV

has a different ground potential to

the antenna socket. To test this, simply discon-

nect all the antenna cables from the wall socket.

If this makes the hum disappear, you will need a

ground breaker (available from most electronics

stores). Simply insert the ground breaker be-

tween the antenna socket and the TV/receiver.

3. A line filter (to be purchased separately)

can

also be useful for hum removal. Note that you

will need to connect all your electrical devices

to the line filter. Make sure you can return the

line filter for a refund if it does not produce

the desired results.

4. Some types of power multiboxes are also

known to produce hum. Try eliminating your

multibox and plug the subwoofer's power cable

directly into the mains socket.

5. If possible: Unplug the mains cable, rotate

the connector plug by 180°,

and plug it back

into the mains socket.

6. If you have trouble locating the source of the

hum,

check whether the subwoofer is less noisy

when you plug it into the mains connection in

another room (e.g., using an extension cable).

Also, try disconnecting the subwoofer's RCA

cable from the receiver

to see whether the hum

is caused by one of the other connected

audio

devices.

Problems and solutions · Cleaning · Technical specifications

Cleaning

Please take note of the following guidelines to

protect the components and maintain the finish

of your Teufel loudspeakers:

Avoid placing the speaker cabinets in direct sun-

light. Avoid extreme temperature fluctuations

and protect your loudspeakers against humidity.

When cleaning the speaker cabinets, only use dry

or moist cloths. Never use abrasive or alcohol-

based cleaning products. If you need to clean a

speaker membrane, do so very carefully using a

dry cloth.

Technical specifications

All technical specifications are listed in our cata-

logue as well as on our website: www.teufel.eu

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Teufel System 4 Seite 15

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