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Overdrive protection
Set-up tips
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There is only one serious restriction which should be observed: a subwoofer should not be placed much
closer to the listener than the main speakers (max. 1m). A larger distance is better (i.e. a position behind
the main speakers up to approx. 1m, or from special subwoofer outputs and when reproducing surround
video effects up to 3m.)
In addition to maximum sound pressure, the bass quality can be improved by using a pair of ELAC sub-
woofers. If both subwoofers are connected to one source (mono), the second unit should be placed
asymmetrically to all the other loudspeakers, not directly beside the first one. This ensures even and less
resonant bass, typical of large open rooms, can also be achieved in small rooms. If however, two sub-
woofers are operated in true stereo mode, they should be placed at approximately the same distance
from the respective main speaker and the listener, with a maximum difference of 0.5 - 1m depending on
the crossover frequency.
Where two ELAC subwoofers are used in parallel (or stereo), both should be adjusted equally. With some
digital sound formats (e.g. Dolby Digital) all channels, including the rears, are driven with full dynamics
and bandwidth, even frequencies in the sub-audible ranges are often transmitted. Thus, you may find that
the rear channels perform better with a subwoofer of their own. For this, the universal connection options
of the ELAC subwoofer can be used. In larger rooms, the set-up of a second or third subwoofer may also
be useful, depending on the size and model.
A special feature of your ELAC subwoofer is the overdrive protection. It provides clear bass reproduction
and ensures that there are no distortions from overdriving the amplifier and / or the driver units.ELAC
uses a frequency and power dependent electronic stabilization program.
ELAC’s subwoofers perform similarly to that of a car, where the electronic stabilization program controls
the car’s stability to keep it in it’s lane in all situations. In comparison to conventional subwoofers without
overdrive protection, it is almost impossible to overdrive active subwoofers which provide it.
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