Genesis I.C.E. Genesis 5.2 - Manual (Page 8)

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Adjusting Bass Gain
Leave the low pass filter alone for the moment, as it should remain
set at approximately 90 Hz. This control will be addressed later.
Turn the gain control of the woofer amplifier up or down until the
voice sounds correct. Whatever controls you use, turn them up and
down only a little at a time. It is easy to turn it up or down too much.
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 woofers amplifier’s gain up till it does. If you find that
turning the volume up creates too much low bass, you will then need
to work on the low pass filter.
Low Pass filter
This control will lower the frequency cutoff point of the woofer.
Turning the low pass filter up to a higher number will extend the
upper bass regions without affecting the low bass level. Some rooms
may require you to set the low pass filter up to 130Hz. Do not be
afraid to increase this control to give the sound more body.
Next, set the woofers using more than just a voice. Select some
music that you know to have good deep bass. Set the gain on the
woofers for a natural and powerful bass sound. Use a symphonic
piece of music if you can, or use a natural bass instrument for your
guide. Try to make it sound real. You may have to return to the vocal
to make sure you have not gone too far in one direction.
At this point, if there is not enough mid bass, turn the low pass
number to a higher position or, alternately, position the main
speakers closer together in order to achieve better mid bass
coupling between the main speakers. If it sounds too “fat” turn the
low pass control down or adjust the volume. Small rooms have more
bass gain, hence the smaller the room, the higher the low-pass
frequency to use, and the lower the bass gain level.
Imaging and Soundstage
If your vocal selection is a well-recorded audiophile CD or LP, the
performer should appear to come from behind the loudspeakers and