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· LT 3 PE
General note:
Make sure to read this operating manual care-
fully and in its entirety. Before plugging in the units for the first
time, make sure you have complied with all relevant safety and
operating instructions. Keep this operating manual in a safe
place so you can refer to it at a later date if necessary.
Always:
If in doubt, consult the operating manual. Make sure
to comply with all instructions regarding the units' setup and
ongoing operation.
Cleaning:
Only use dry or moist cloths to clean your speaker
cabinets Never use abrasive or alcohol-based cleaning prod-
ucts. If you need to clean a speaker membrane, do so very care-
fully using a dry cloth. Before cleaning a unit, always unplug the
power cable.
Humidity and sunlight:
Never operate the unit in humid or
wet spaces, e.g., near a bath tub, shower, wash basin, drain, in
a damp basement, or near a swimming pool. Never expose the
loudspeakers to excessive humidity. Also avoid exposing them to
direct sunlight. Do not expose device to dripping or splashing
water. Do not place objects filled with liquids, such as vases on
the device.
Placement:
Never mount the units loosely in a vehicle, on an un-
stable surface, on a loose stand, on unsuitable furniture, or with
insufficient bracing. The loudspeakers could topple and cause
personal injuries, which you will be liable for. Especially when
speaker cabinets are mounted on stands or placed on top of
TV sets/monitors, they may topple due to external stress (cable
being pulled, tripping over cable, accidental physical contact)
– even if they seem to be mounted quite securely. As a result
of their weight, toppling speaker cabinets can cause consider-
able damage, as well as becoming badly damaged themselves.
The same applies to undersized or unprofessionally installed
wall-mounting brackets, particularly on light walls. Always use
adequately sized wall brackets for mounting loudspeakers, and
ensure that the wall can withstand the stress. Never mount the
units near a heat source. This could be a heater or oven, but
also any other electrical device that heats up during operation
(e.g., amplifier). Similarly, never place a heat source on top of the
loudspeakers, such as a fan heater or candles.
Ventilation:
There are several ventilation slits and openings in
the unit's housing. These are designed to ensure reliable opera-
tion and stop the unit from overheating. Never block or cover
the ventilation slits; do not place the unit on a soft surface
such as a bed, couch, carpet, etc., as this blocks the ventilation
slits in the bottom of the housing. Do not put any newspapers,
tablecloths, etc., on top of the unit. Most importantly, do not
cover up the heat sink of the amplifier section or expose it to
direct sunlight. Conversely, you should generally not attempt
to provide additional cooling to the unit yourself. This is not
necessary.
Power source:
Make sure to connect the subwoofer to a power
source that provides the correct voltage, i.e., the voltage in-
dicated on the type plate. If you are unsure about the voltage
provided by your domestic power connection, please contact us
or your local electricity provider for advice. The unit does not
require earthing. When connecting to the mains power socket,
always use the supplied two-pole power cable. Under no circum-
stances should you modify the power cable, as it must comply
with the official polarity and earthing regulations. Make sure to
plug the power cable only into a double-pole socket. Make sure
the power switch is in the “off” position before connecting or
disconnecting the device.
Cables:
Lay all the cables flush with the floor and walls. Avoid
any loops in your cables that could cause people to trip up.
Cable loops can also cause electrical interference and degrade
the sound quality. Make sure to lay your power cables out
of reach so that they are not stood on or squashed by heavy
objects. If you notice any cable damage, replace the cable. Pay
special attention to all plug connectors, the mains socket and
the subwoofer's connector panel. Regularly check all powered
cables to and from the loudspeakers for insulation issues and
breakage. If you detect a fault, immediately power down all con-
nected units, unplug the cables and replace the defective cable.
Disuse:
During prolonged periods of disuse (holidays, etc.), al-
ways unplug the subwoofer from the mains socket.
Thunderstorms:
In the event of a thunderstorm, switch off and
unplug the unit as soon as you can in order to avoid damage
from lightning strikes.
Overloading:
Never overload your wall sockets, extension
cables and multiboxes, or the integrated power sockets on
your electrical devices. Power overloads can cause short cir-
cuits and fires. Also avoid turning up the volume control exces-
sively on your amplifier, particularly if you are also boosting
the bass frequencies (bass control, loudness button, bass boost
button, etc.).
Liquid and foreign substances:
Liquids or other foreign sub-
stances should never get inside the unit, as they may interfere
with exposed live parts and cause short circuits or fires. Abso-
lutely avoid spilling any type of liquid onto the unit. In case of a
fault: Never attempt to repair the unit yourself. Always contact
our support team first and discuss the fault with them. If ap-
propriate, they may give you instructions on how to clear the
fault. If this is not possible, send the unit directly to our service
address.
Transport:
Take utmost care when transporting the unit, and
use a sack barrow if possible. Be aware that both the sack bar-
row and the unit can easily fall over as a result of sudden stop-
ping or jolting (uneven ground, lurching movements, etc.).
Unusual noises:
If any unusual noises occur during operation,
or if the sound gets distorted, immediately turn down the am-
plifier volume to a level where the sound returns to normal.
Replacing the fuse:
Unplug the power cable before replacing the fuse. Make sure
that the replacement fuse has the same rating as the defec-
tive fuse.
Speaker volume:
Excessive loudspeaker volume can cause ir-
reversible hearing loss. The subwoofer may emit high sound
pressure levels very unexpectedly when it is suddenly triggered
into activity by a bass impulse (“Standby/Auto On” mode) – par-
ticularly if the unit is on full volume. As well as physical hearing
loss, also watch out for psychological stress caused by excessive
volume. Children and pets are particularly sensitive to noise. Al-
ways set the volume control of your audio system to a level that
is appropriate to the surroundings. When the system is playing
at high volume, do not stand too closely to the subwoofer and
never put your ears directly up to any of the loudspeakers.
Please read the following
safety guidelines
very carefully.
Packaging materials,
particularly plastic bags and
foils, should be kept out of
children's reach, as they can be
dangerous (e.g., risk
of suffocation)
Never leave your children
alone with electrical devices, as
there is always a risk of
electrical shock.
In case of an emergency:
Immediately disconnect the
unit's power plug from the
mains socket. In the following
cases, please contact one of our
service technicians:
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Power plug or cable
is damaged
4
Liquid or
other foreign substances
have got inside the device
4
The unit has been directly
exposed to rain or another
type of liquid
4
The unit is inoperative
even though you have
followed all the operating
instructions
4
The unit has been dropped
or otherwise damaged
We are not liable for any inci-
dents resulting from disregard
of the safety guidelines.
Safety guidelines