Sony SA-VA1 - Manual (Page 5)

Enhanced theater mode speaker system SAW (Super Acoustically-loaded Woofer)
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for center channel
Super woofer
A key point in obtaining maximum surround effect when
playing sources with the Dolby Pro Logic surround sound
system is the use of a center speaker. The center speaker
makes dialogue and other centrally positioned sounds
clearer and the sound image more unified. For this reason,
true home theater systems use a center speaker equivalent in
quality to the front speakers and positioned very close to the
screen image.
With its "enhanced theater mode speaker system", the
SA-VAl offers a simple, high-performance home theater
system that produces high-quality center channel sound
with only two ftont speakers.
In this system, high-frequency center channel sound is
product by center channel tweeters, situated in the fiont
left and right speakers and oriented inwards at an angle of
30** (see diagram), and low-frequency center channel sound
is produced by mixing with front channel signak and
reproduction through the front speakers. The result k a
high-quality center sound with the same high quality as the
front channel sound, and a superior, imified sound image for
maximum surround sound effect.
Inner duct
, Super woofer
drive unit
Super woofer cross section
The SA-VAl incorporates SAW-type super woofers in the
fiont left and right speakers to form a DBR super woofer
system. The SAW design features two inner chambers and a
centrally-positioned super woofer drive unit. Through
precise control of the acoustic characteristics of the front and
rear chambers, the system reproduces ultra-low firequendes
with high power and clarity.
The SA-VAl features a SAW-type super woofer in both left
and right front speakers, produdng powerful sounds for
impressive movie effects.