In addition to maximum sound pressure, the bass quality can be improved by using a pair of ELAC subwoofers. If both
subwoofers are connected to one source (mono), the second unit should be placed asymmetrically to all the other loud-
speakers, not directly beside the rst one. This ensures even and less resonant bass, typical of large open rooms, can also be
achieved in small rooms. If however, two subwoofers are operated in true stereo mode, they should be placed at approximate-
ly the same distance from the respective main speaker and the listener, with a maximum dierence of 0.5 – 1 m depending
on the crossover frequency.
Where two ELAC subwoofers are used in parallel (or stereo), both should be set to the same level. 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 nd 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.
Overload Protection
A special feature of your ELAC subwoofer is the overload protection. It provides clear bass reproduction and ensures that
there are no distortions from overdriving the amplier 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 its lane in all situations. In comparison to conventional subwoofers without overload protection, it is almost impos-
sible to overload active subwoofers which provide it.
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