Manual Teufel Concept E 200 (page 18 of 20) (English)

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 · Concept E

»The subwoofer is buzzing«

The Concept E 100/200/300/400 has a power-

ful transformer and a generously proportioned

power pack that make its high output perform-

ance possible. These components can produce a

very quiet, unobtrusive buzzing sound that can

be detected a short distance from the side of

the subwoofer in quiet rooms in the absence of a

signal. During operation this minimal buzzing will

disappear as 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 fault – assuming the subwoofer is

not touching other appliances. In some cases, it

could come from connection to other appliances,

through equalising currents that are caused by

different casing potentials or similar. Please read

the following instructions for a solution to the

case above:

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 sin-

gle power circuit or plug.

2. The aerial connected to the equipment or TV has

a different ground potential than 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 for around 5–10

euro from electronics retailers). Insert the filter

between the aerial socket and the TV or receiv-

e r.

3. A mains filter that can be bought separately, to

which all appliances must be connected, may be

useful in eliminating the buzzing. Please ensure

you have the right to return the filter if it fails to

yield positive results.

4. In some cases a multi-socket extension has

been shown to cause the buzzing. 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. To narrow down the source of the buzzing,

plug the subwoofer in to the power socket in

another room (e.g. using an extension lead)

and check if the buzzing can still be heard.

You should also try disconnecting the cinch

connection between the subwoofer and the

PC/DVD player/receiver in order to cross off

interference by other connected compo-

nents.

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.

»There is no sound – neither from the satellites

nor the subwoofer«

Please check to see if the

LEDs on the front of the

subwoofer display are il-

luminated; if not, change

the fuse. The main fuse

on the subwoofer might

have blown as a result of

a power surge. The fuse

compartment on the

Concept E subwoofer is

underneath the IEC power connector (see illustra-

tion on page 16, item T). Always disconnect the

subwoofer from the mains supply before replacing

the fuse! Use a small screwdriver to open the lid,

replace both fuses and return the fuse holder to

the fuse compartment. The subwoofer should now

be ready for use again.

»There is no sound from one of the satellites,

or the sound is distorted – all of the other sat-

ellites are working«

In order to pinpoint the defect more specifi-

cally, please swap the non-functioning satellite

for a functioning satellite in order to determine

whether the defect is in the satellite or the sub-

woofer. If the non-functioning satellite now plays

on a different subwoofer channel, the fault is

probably with the subwoofer electronics. If the

satellite fails to play on a different channel, the

satellite itself is faulty.

»There is no sound from the subwoofer – all of

the other satellites are working«

You can check the function of the subwoofer by

connecting the subwoofer cinch input on the sub-

woofer only to the output from one of the front

channels L/R front on the sound card or a device

such as a portable CD player. If the subwoofer now

Troubleshooting

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Teufel Concept E 200 Manual

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