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14. Problems and solutions – Cleaning – Technical specifications
The subwoofer is not working
If the Power LED or display of the subwoofer does
not light up, replace the fuse with a fuse of equal
rating.
If the Power LED lights up, set the subwoofer vol-
ume level to "Min.", unplug the subwoofer cinch cable
from the amplifier, turn up the volume slightly and
touch the tip of the cinch connector with your fin-
ger. If this produces a hum or crackle, the fault is
with the amplifier or the amplifier settings. If the
subwoofer remains completely silent, please con-
tact 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
1. The subwoofer is connected to a different elec-
2. The antenna connected to the audio system or TV
3. A line filter (to be purchased separately) can also
Teufel
If you have any questions, suggestions or criticisms, please contact our support team:
Lautsprecher Teufel GmbH
Gewerbehof Bülowbogen · Bülowstraße 66
10783 Berlin · Germany
36 Teufel · LT 7
following:
trical circuit than the other components. Make
sure that all connected devices (including any
computers) are powered from the same electrical
circuit, i.e., the same mains socket.
has a different ground potential to the antenna
socket. To test this, simply disconnect all the an-
tenna cables from the wall socket. If this makes
the hum disappear, you will need a ground break-
er(available from most electronics stores). Simply
insert the ground breaker between the antenna
socket and the TV/receiver.
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 dis-
connecting the subwoofer's cinch cable from the
receiver to see whether the hum is caused by one
of the other connected audio devices.
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.
Ph.: +49(30) 30 09 30 0
Fax: +49(30) 30 09 30 30
www.teufel.eu
No responsibility can be accepted for
the correctness of this information.
Subject to technical changes. Errors
and omissions excepted.
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