Instruction manual

STEREO SYSTEMS
These tend to be difficult to integrate with conventional subwoofers
because, for the most part, sub woofers are generally not designed
to match them and suit 5.1 systems only. The Epos ELS Sub is
different and was conceived as a means of extending the
frequency response of a small pair of bookshelf speakers, rather
than just producing large outputs at one particular frequency, such
as 60 Hz.
This may appear to contradict established principles, but Epos
engineers have not limited themselves to only trying to produce a
product that plays 'one note' sound. For that reason the ELS Sub is
capable of extending low frequencies with a relatively flat
response down to 20 Hz. This is most unusual and would normally
be unheard of in conventional woofers, because apart from
anything else, their cabinets and amplifiers would rattle and buzz,
due to the simple method of construction used.
OVER CURRENT CUTOUT
The ELS Sub does not use a compression limiter to pre-distort the
signals it cannot handle, to prevent it from cutting out. No amplifier
has infinite power capabilities and has to be protected from
destroying itself under extreme conditions. To protect the ELS
Sub's 300W amplifier from excessive current demands, it has
been designed to cut the signal to the speaker in the event of an
overload.
This will temporarily mute the subwoofer and stop it from working
until the demand is lower. If the volume is reduced, the frequency
range is altered to cut-off at a higher frequency or the passage
containing the high level low frequency sound is passed, the sound
output will be restored automatically.
OVER TEMPERATURE CUTOUT
To protect the amplifier from damage caused by excessive heat,
there is a thermal sensor attached to the amplifier's heatsink that is
set to trip the output if the internal temperature exceeds a pre-set
level. If this happens, the ELS Sub will stop working until the
temperature reduces to an acceptable level.
The reasons this might happen are high ambient room temperature,
direct sunlight, high level operation for long periods and insufficient
ventilation of the amplifier control panel.
POSITIONING AND TUNING
Remember that low frequencies have a longer wave length and
sound waves travel to the ear in waves. So, it may be necessary to
move your subwoofer to different positions to completely suit your
requirement or taste. If you require more or less power at low
frequencies, it can be affected by the proximity to an adjacent wall or
boundary.
Each wall or boundary will further enforce the effect of the woofer so
moving it closer or further away from a rear or side wall will change
the sound effect dramatically. Corners double the effect as there are
two boundaries.
The ELS Sub has been designed to match medium to small rooms,
2
with an area of approximately 10-20 M or 300-600 sq feet. If higher
power or larger rooms are used, it may be necessary to increase the
number of ELS Subs used in a single installation. The Low level
output sockets make it easier to patch the signals through to a
second or third ELS Sub, which can be placed elsewhere in the
room.
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Subwoofer Performance