15
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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
completely 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:
1.
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.teufelaudio.
com
