Q Acoustics Q B12 Manuel Du Propriétaire page 14

Stereo System
Setting Up
Check that all system connections are properly and securely made. Ensure that the subwoofer is
switched off. Set the controls to the following default settings:
Level
Crossover
Phase invert
Auto on
Plug the supplied power cord into the subwoofer and then into the AC supply socket. Switch on
the power at the supply socket and then switch the POWER switch on the subwoofer to 'ON'. The
Status light on the subwoofer amplifier panel will glow and the subwoofer is operational.
Play some music you are familiar with and experiment with the PHASE setting and LEVEL control
until you hear a good blend between the front speakers and the subwoofer. If you can hear the
subwoofer standing out it's too loud!
Always bear in mind that the human ear's sensitivity to bass varies enormously with the volume
level, hence the need for a wide range of programme material and sound levels. Once you are
happy with the sound you can then fine tune the performance by using the remaining controls.
CROSSOVER: The crossover control determines the frequency above which your subwoofer
output begins to diminish. This should be set so that it corresponds with the frequency your main
speakers begin to produce a strong output by themselves. The adjustment allows for a smooth
handing over between subwoofer and main speaker output. If this setting is too low there will be
a 'hole' in the sound where certain frequencies are weak, conversely if it is too high there will be
an exaggeration of certain frequencies producing an overpowering bass. You can get an idea of
the correct setting from your main speakers' specification sheet. Look for the lowest frequency
that the speaker produces (the "-3dB point") under the "Frequency Response" heading. Room
positioning has a dramatic effect on low frequency reproduction of both the subwoofer and your
main speakers so don't be worried if you find you require a setting which does not correlate with
the specified low frequency point of your main speakers.
Approximately half
Minimum (50Hz) for large floorstanders and halfway (100Hz) for
bookshelf or small speakers
0°
AUTO or ON
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