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Problems and solutions · Cleaning
Technical specifications and operating manual
The subwoofer is not working
set the subwoofer volume 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 finger. If this pro-
duces a hum or crackle, the fault is with the am-
plifier or the amplifier settings. If the subwoofer
remains completely silent, please contact our sup-
port 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
2. The antenna connected to the audio sys-
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-
Teufel
If you have any questions, suggestions or criticisms, please contact our support team:
Lautsprecher Teufel GmbH
Gewerbehof Bülowbogen · Bülowstraße 66
10783 Berlin · Germany
16 Teufel · System 9 THX
®
Ultra 2
If the Power LED on the rear
panel does not light up, re-
place the fuse with a fuse
of equal rating (see page 15,
point 6).
If the Power LED lights up,
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.
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 electron-
ics stores for EUR 5.00–10.00). Simply insert the
ground breaker between 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 cinch
cable from the receiver to see whether the hum
is caused by one of the other connected audio
devices.
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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