Frequently Asked Questions - Teufel Power Edition Concept E Magnum Technical Specifications And Operating Instructions

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· CEM Power Edition

Frequently asked questions

"The subwoofer is buzzing"
The Concept E Magnum has a powerful trans-
former and a generously proportioned power
pack for high-output performance of 450 watts.
These components can create a very quiet,
unobtrusive buzzing sound that can be heard a
short distance from the back of the subwoofer
in quiet rooms if there is no signal present. It
cannot be avoided in this price category. Dur-
ing operation this light buzzing will disappear
because it is masked by the sound output.
On the other hand, if the buzzing can clearly be
heard from a distance of more than a metre and/
or can also be heard from the satellites, there is
possibly a defect, – assuming the subwoofer is
not touching other appliances. In some cases, it
could come from connection to other appliances,
through equalizing currents that are caused by
different casing potentials or similar.
Please read the following instructions for a solu-
tion to the latter case:
1 . The subwoofer is connected to a different
power circuit from the rest of the equipment.
Ensure that all linked appliances (including the
PC if connected) are connected to a single power
circuit or plug.
2 . The aerial connected to the equipment or TV
has a different ground potential to the socket. To
test this, simply remove all aerial cables from the
wall socket. If the interference stops, you need a
sheath current filter (available from electronics
retailers). It is inserted between the aerial socket
and the TV or receiver.
3 . A separately purchased mains filter, to which
all appliances must be connected, may be useful
in eliminating the interference. Please negotiate
a right to return for the filter, in case it does not
lead to positive results.
4 . Occasionally, a multiple socket strip proves
to be responsible for creating buzzing noises.
To test this, disconnect the plug strip and plug
the subwoofer's mains plug directly into a wall
socket.
5 . You can also try turning the mains plug around
and inserting it into the socket the other way up,
inasmuch as your mains plug/socket allows this.
6 . In order to better localise the cause of the
buzzing, check whether the subwoofer operates
without buzzing on a power circuit in another
room (e.g. using an extension lead). You should
also try disconnecting the cinch connection
between the subwoofer and the PC/DVD player/
receiver in order to exclude the influence of con-
nected components.
7 . It can be useful to create an additional earth
by fixing a cable (e.g. speaker cable) to the metal
screw of the power amplifier and fixing the other
cable end e.g. to the heating pipe or PC casing.