Pioneer SBX-300 Kullanım Talimatları Kılavuzu - Sayfa 15
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Chapter 4
Other Functions
PHASE CONTROL
technology
PHASE CONTROL technology is used with this
unit.
During multi-channel playback in a typical
home theater, the LFE (Low Frequency
Effects) signals and low-pitched components
contained in various channels are routed to the
subwoofer or other optimum speaker. However,
in principle, this routing process results in a
frequency where the phase is shifted (group
delay), leading to problems where the low-
frequency sounds only arrive delayed or low-
pitched sounds cancel each other out due to
interference with other channels. The PHASE
CONTROL technology in the unit is used to
recreate powerful low-pitched sounds that are
faithful to the original sounds.
The phase indicates the time relationship
between two sound waves. Two sounds waves
are said to be "in phase" if their peaks match
up with each other, and the phases are said to
be "out of phase" if their peaks do not match
up.
When the PHASE CONTROL technology is
used, it can provide the following effects when
the sound source is played back.
No PHASE CONTROL technology
Front speaker
Sound
source
Subwoofer
• Rhythm is out of phase and unclear
• Poor quality of low-pitched sounds
• Musical instruments have an unrealistic sound
With PHASE CONTROL technology
Front speaker
Sound
source
Subwoofer
• Clear rhythm
• Low-pitched sounds keep their quality
• Musical instruments have a realistic sound
Note
• The PHASE CONTROL technology is always
activated.
Phase Control technology is a trademark
assigned to products that provide matching
of the phase characteristics from recording
to playback based on the PHASE CONTROL
technology concept developed by PIONEER.
Other Functions
15
En
Listening
position
Timing is
delayed, and
sounds cancel
each other out
Listening
position
Original sound
tone can be
heard