SV Sound PC12-NSD - Manual (Page 11)

But what’s “too high”?? Tastes vary, and do movie soundtracks, but
your SVS subwoofer is capable of tremendous levels of low distortion,
low frequency bass — far more than most subs in this size or price class.
Take advantage of this, especially if you like action movies with lots of
“.1” channel (LFE) bass action, and give the sub a bit extra gain during
calibration. Keep in mind too that the human ear is relatively insensitive
to low frequencies. This, coupled with the fact most folks don’t watch
movies at full “theater levels” means raising the bass up a few decibels
(dBs) usually yields a more satisfying movie and music experience.
What bass levels do we recommend? If you watch movies at moder-
ate sound levels, a good start is a range of +1dB to +3dB above your
other channels (as measured with your sound meter). This means the
test tone will waiver about 78 dB for the subwoofer portion of the calibra-
tion run using your receiver test tones.
Note too that many modern A/V receivers allow a variety of subwoofer
level settings, depending on the “listening mode” you are in. With “Dolby
Digital” as your “mode” use the above calibration routine. You may well
find that CD “Stereo” music calls for a lower bass settings. The above is
a guide… experiment! The louder your master AVR volume however,
the more you should reduce the subwoofer’s playback level to compen-
sate. You should always avoid your driver “bottoming”, resulting in a
loud “clack”!
Location and measurement. You should take the above measure-
ments from your typical preferred seat for watching movies. Be advised,
strong bass levels can vary tremendously simply by moving your seat, or
your subwoofer, just a short distance. Such is the nature of long wave-
length, deep bass sound. Do not hesitate to try different locations and
different levels for your subwoofer.
Setting playback levels on the sub which are too high (and often, too low)
is the most common theater/music setup error.
Page 11
Page 11 SV Sound
Chapter 6-4