Technical Specifications and Operating Manual
12
· System 5
The subwoofer is not responding
If the Power LED on the rear
panel does not light up, re-
place the fuse (see page 11,
point
).
If the power LED on the
front side is lit, set the sub-
woofer volume level (page 11,
point
) to “Min”, unplug the subwoofer's RCA ca-
ble from the amplifier, turn up the volume slightly
and touch the tip (“hot” signal line) 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 hums
Hum may be caused by connected audio equip-
ment 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 elec-
trical circuit than the other components. Make
sure that all connected devices (including any
computers) are powered from the same elec-
trical circuit, i.e., the same mains socket.
2.
The antenna connected to the audio system or
TV has a different earth potential than the an-
tenna socket. To test this, simply disconnect all
of the antenna cables from the wall socket. If
this makes the hum disappear, you will require
a ferrite bead (available at most electronics
stores). Simply insert the ferrite bead 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.
Certain powerstrips can also cause hum. Try
removing your powerstrip and plug the mains
cable of the subwoofer directly into the mains
socket.
5.
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
devices.
Problems and solutions · Cleaning · Technical specifications
Cleaning
Please take note of the following guidelines to
protect your Teufel speakers:
Avoid placing the speaker cabinets in direct sun-
light. Avoid extreme temperature fluctuations
and protect your loudspeakers against humid-
ity. When cleaning the speaker cabinets, only
use dry or moist cloths. Never use alcohol-based
or abrasive cleaning products. If you need to
clean a speaker membrane, do this very carefully
using a dry cloth.
If you have any questions, suggestions or criticisms, please contact our support team:
No liability can be accepted for the cor-
rectness of this information. Subject to
technical changes. Errors and omissions
excepted.
Lautsprecher Teufel GmbH
Gewerbehof Bülowbogen · Bülowstrasse 66
10783 Berlin (Germany)
Tel: +49(30) 30 09 30 0
Fax: +49(30) 30 09 30 30
www.teufel.eu
