B&K AVR 707, User Manual

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Crossover and LFE
Crossover Frequency - Sets the frequency at which bass tones are filtered
from the small speaker channels and sent to the subwoofer. The crossover
point is the frequency at which the amount of information in the subwoofer and
main speaker(s) is equal. Set this according to the capabilities of the speakers
and/or subwoofer. When speakers are set to small, the crossover and above
is sent to the subwoofer. When the subwoofer is set to Yes or Ultra, the
crossover and below is sent to the subwoofer (except when set to None).
High Pass / Low Pass Slope - There is a gradual transition when crossing the
signal from the speakers to the subwoofer. The crossover slope determines
how gradual or abrupt this transition occurs (6, 12 or 24 dB). More gradual
slopes generally result in a smoother transition from speakers to subwoofer.
However, gradual transitions may cause distortion in small speakers due to too
much bass information. The low pass slope may be set to NONE which will
send full range to the subwoofer output allowing an external crossover to han-
dle the low pass slope. If the subwoofer has an off or bypass selection for it's
internal crossover, we recommend setting it to off and using the receiver's crossover.
LFE Level - Used to increase or decrease the subwoofer level. The subwoofer signal may want to be increased or decreased depending on the
room or installation. Usually this will be set to 0.0 dB (default). Note that this effects only the separate LFE (.1) or subwoofer channel available
on source material. There is no effect on the reproduction of normal bass from the front, center, or surround channels.
Room Equalization
Sometimes it may be desirable to boost or reduce the levels above or below
a certain frequency. This might be used to make up for small deficiencies in
the listening room or speakers. The equalization may be applied only to cer-
tain speakers. This might be used to obtain a more consistent timbre between
unmatched speakers. For example, if only the front speakers need to have
frequencies above 10kHz boosted 1dB, then room equalization setup menu
will be adjusted as shown right. In some home theaters the center speaker is
installed behind a projection screen. The screen will tend to cut the high fre-
quencies. Applying a high boost only to the center channel can compensate
for the losses introduced by the screen. Or possibly center and front left/right
speakers are behind the screen. A high boost may be applied to all three of
these speakers with no effect on the surround or back speakers. Shelving
equalization helps to adjust level and frequency to aid in adjusting your room
for a flat frequency response. Room Equalization parameters are applied
globally regardless of the selected user EQ (Variable EQ, the Loudness EQ,
Cinema EQ or the Vocal EQ).
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BKcSuite System Settings - Audio