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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. The reason we use a female vocal to start is that male
vocals will have very much more bass content, and the lower bass
may obscure the mid-bass crossover point.
If the voice sounds “thin” or does not have enough “chest” to its
sound, turn the woofers amplifier’s volume up till it does. If you find
that turning the volume up creates too much low bass, you may want
to lower the low-pass filter cut-of frequency from 98Hz to 96Hz or
even lower.
The Low-pass Filter control will raise or lower the low-frequency cut-
off 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 very large rooms may require that you set the low-
pass filter very high up to 115Hz. Do not be afraid to increase this
control to give the sound more body, or reduce it if you find that there
is mid-bass boominess.
Next, set the woofers using more than just a voice. Select some music
that you know to have good deep bass. Using the volume control on
the servo amplifier’s remote control, set the woofers for a natural and
powerful bass sound. Use a symphonic piece of music if you can, or
use a natural double bass instrument for your guide. If there is a
running bass line, each note should sound equally loud.
Try to make it sound real. You may have to return to the vocal to
make sure you have not gone too far.
If, at this point, there is not enough mid-bass, turn the Low-pass
frequency up, or 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 filter down or adjust the bass
volume down.
As a rule, the bass gain and the low pass filter works in opposite
directions. A higher bass volume will require a lower low pass
frequency, and a higher low pass frequency will require a lower bass
gain volume.
It is unfortunate that much of popular contemporary music is recorded
and mastered with too loud a level, and often with the bass boosted
so that they would sound better (or just louder) with mid-fi systems.
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