ELAC SUB 2090 Bedienungsanleitung Seite 24

4. PHASE
Selecting the correct phase ensures that the bass signals reproduced by the subwoofer
blend seamlessly with those from the main loudspeakers.
If the subwoofer and main loudspeakers are operating in phase, this results in homoge-
neous bass reproduction across the entire bass frequency range, with no „holes" and no
peaks that manifest themselves as a droning bass sound at specific frequencies.
The correct setting for the phase adjustment must be determined by listening tests. Play
a piece of music that contains a wide range of different bass frequencies. The phase is
correctly set if no frequency stands out unpleasantly and all frequencies are reproduced
at a consistent volume.
5. AUTO ON / OFF
The „AUTO ON/OFF" function is used to activate or deactivate the auto-on function.
„AUTO = ON" is the normal setting. The ELAC subwoofer is kept in power-saving stand-
by model (LED glows very dim). A sensor continuously monitors the inputs. Once a
sufficiently strong bass signal is detected, the power output stage is activated. Within a
few tenths of a second, the subwoofer is ready for operation and the LED glows brighter.
If no further input signals are detected, the ELAC subwoofer remains for approximately
15 minutes in fully operational mode before returning to stand-by mode.
The sensitivity of the auto-on function („AUTO ON THRESHOLD") can be set from 1 – 10
mV. The correct sensitivity for your application will depend on the (pre-) amplifier used.
A value of between 3 and 6 is generally suitable.
If AUTO ON/OFF is deactivated, the subwoofer is permanently fully activated and will no
longer switch to stand-by mode.
6. PARAMETRIC EQUALIZER
The parametric equalizer allows you to adjust the „CENTRAL FREQUENCY" as well as the
„BAND-WIDTH" and „GAIN" settings.
This not only allows you to boost specific frequency ranges but also lets you selectively
filter out annoying room resonances („droning" or „booming bass").
To attenuate an annoying room resonance, you must first pinpoint the frequency that
is causing it. The most effective method is to use a test CD of pure tones in the bass
frequency range. Start by playing the bass notes in sequence. If one bass note sounds
unnaturally loud, this is the room resonance that you can damp with the help of the
equalizer. To do this, set the CUTOFF FREQUENCY control to the frequency determined
using the test CD. Select a „NARROW" bandwidth and reduce the GAIN control until the
bass note is reproduced with the same apparent loudness as the other frequencies.
To selectively boost a particular frequency range, you should increase the bandwidth
slightly (move the control towards „WIDE") and then carefully adjust the „GAIN" setting
to avoid any unnatural „droning" in the sound reproduction.
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