Genesis I.C.E. 12t - Manual (Page 12)

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The Main Controls
The S2/12t subwoofer has two controls that you will use to make
your system (and that includes the room), sound right. The first is the
gain control of the woofer amplifier. This adjusts the volume at which
the subwoofer plays.
The gain can be adjusted from 1 to 11.
The second control is the low pass filter. This adjusts the crossover
frequency for the built-in 12dB per octave variable crossover. The
crossover frequency can be adjusted from 40Hz to 138Hz, where
frequencies below the number set are sent to the subwoofer, and
frequencies above are rejected.
To begin, adjust the low pass filter to 63Hz and set the gain control to 6
(both at the 12 o’clock position). At this point, you can turn on the
woofer amplifier.
Tuning the system in
Set up your subwoofers one at a time in conjunction with the rear or
surround speaker that you are using them to augment. If you are using
a single subwoofer to augment two different loudspeakers, adjust the
subwoofer with one speaker at a time.
Set the low pass filter to the -3dB frequency of your main speakers,
and the gain control to 6, and start from there. If you don’t know the
3dB point of your speakers, start working from a low-pass filter
frequency of 63Hz. This will work for most small speakers.
We suggest that you start with a single vocal track, with instrumental
accompaniment, that you are very familiar with. The sound of the
human voice is more easily recognizable than many instruments and is
the least complex sound to deal with. Run a mono full-range signal to
the speaker that you have the S2/12t connected to.
Turn the gain control of the subwoofer amplifier up or down until the
voice sounds correct. Concentrate on the mid bass regions (as
opposed to the very low bass in your recording), to achieve a natural
blend. The voice and the music accompaniment should sound as if it
were cut from one cloth, not separate.
If the voice sounds “thin” or does not have enough “chest” to its sound,
turn the S2/12t’s bass gain control up until it does. You may also want