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power from your surround sound amplifier
channels. If the surround sound system
you are using has a small five or ten watt
amplifier for the rear speakers, stay within
five to eight feet of the listening location. If
you are using a 25 to 50 watt amplifier
you can mount the speakers 10 to 15 feet
away from the listening location and still
achieve reasonably high volume levels.
In large or unusually shaped rooms this
might be the only way to achieve a good
effect. If you like to listen to music sur-
round modes which emulate concert hall
acoustics, more than two surround speak-
ers will prove extraordinarily effective
(See Figure 6). With Niles DS8300AT
and DS8500AT loudspeakers it is easy to
add another pair without affecting the
decor of the room. However, you will
need to use a much more powerful ampli-
fier than that which is built into a typical
surround sound receiver or amplifier.
Niles makes a number of Systems
Integration Amplifiers with proprietary
features that make them uniquely suited to
enhance a good surround sound system.
Consult your local Niles dealer for more
information.
Figure 5
Varying Listening Position
The Boundary Effect
Corners can affect the bass response of the
speaker powerfully! This is called the
boundary effect. You will emphasize par-
ticular bass frequencies and cancel out
other bass frequencies when you place
speakers close to the wall/ceiling bound-
ary or a corner wall boundary. This can
make the speaker sound excessively
boomy and inaccurate to some listeners,
while to others it just seems like more bass
sound. A good rule of thumb is if you
always listen to your current pair of speak-
ers with the bass turned up, you'll enjoy
corner placement. If you keep your tone
controls at neutral, try to keep the speak-
ers at least two or three feet from the
boundaries of the room.
Figure 6
Surround Sound
8
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