AudioQuest has refined and renewed our line of serious high performance OptiLink
cables. All models and all lengths are now available Toslink to Toslink and
Toslink to 3.5mm Mini Optical. When the question is “how can a fiber-optic cable
change the sound?” … the answer is easier to explain than for almost any other
type of cable. If the light source were a coherent laser, firing into a vacuum,
all the light would stay straight, arriving at its destination at the same time.
Even if the LED light source in a Toslink system were coherent, the light
entering a fiber-optic cable is scattered and dispersed by imperfections and
impurities in the fiber. This can be measured as a loss of amplitude … but
amplitude is not the problem, a 50% true loss would have no effect on sound
quality.
The problem is that the dispersed light does get through the
cable, but only after it has taken a longer path, like a pool ball bouncing off
the side-rails, causing it to arrive later. This delayed part of the signal
prevents the computer charged with decoding this information from being able to
decode properly, or even at all. The inability to decode shows first at higher
frequencies (not audio frequencies, this is a mono stream of digital audio
information), so reduced bandwidth is a measurable signature of light being
dispersed by a fiber. The punch line: The less dispersion in the fiber, the less
distortion in the final analog audio signal presented to our ears.
There
is another serious dispersal mechanism in the Toslink system. The fiber is a
relatively huge 1.0mm in diameter, and the LED light source is also relatively
large, spraying light into the fiber at many different angles. Even if the fiber
were absolutely perfect, the signal would be spread across time because light
rays entering at different angles take different length paths and arrives with
different amounts of delay.
The almost complete solution to this problem
is to use hundreds of much smaller fibers in a 1.0mm bundle. Because each fiber
is limited as to what angle of input can enter the fiber, there is far less
variety, and far less dispersion over time. This narrow-aperture effect is
similar to how a pin-hole camera can take a picture without a lens … by letting
in light at only a very limited range of angles, a picture can be taken, whereas
removing the lens from a wider aperture would make photography impossible. Less
light gets through a multi-fiber cable, but the light that does get into the
fibers comes out within in a much smaller time-envelope.
So there is one
problem, the dispersion of light across time … and two avenues towards a better
result: less dispersion in the fiber (better polymers and ultimately quartz),
and less dispersion by filtering the input angle. How simple is that! Listen and
enjoy
AudioQuest Pearl optical optiline kaabel
- Mudel: Pearl optical
AudioQuest has refined and renewed our line of serious high performance OptiLink
cables. All models and all lengths are now available Toslink to Toslink and
Toslink to 3.5mm Mini Optical. When the question is “how can a fiber-optic cable
change the sound?” … the answer is easier to explain than for almost any other
type of cable. If the light source were a coherent laser, firing into a vacuum,
all the light would stay straight, arriving at its destination at the same time.
Even if the LED light source in a Toslink system were coherent, the light
entering a fiber-optic cable is scattered and dispersed by imperfections and
impurities in the fiber. This can be measured as a loss of amplitude … but
amplitude is not the problem, a 50% true loss would have no effect on sound
quality.
The problem is that the dispersed light does get through the
cable, but only after it has taken a longer path, like a pool ball bouncing off
the side-rails, causing it to arrive later. This delayed part of the signal
prevents the computer charged with decoding this information from being able to
decode properly, or even at all. The inability to decode shows first at higher
frequencies (not audio frequencies, this is a mono stream of digital audio
information), so reduced bandwidth is a measurable signature of light being
dispersed by a fiber. The punch line: The less dispersion in the fiber, the less
distortion in the final analog audio signal presented to our ears.
There
is another serious dispersal mechanism in the Toslink system. The fiber is a
relatively huge 1.0mm in diameter, and the LED light source is also relatively
large, spraying light into the fiber at many different angles. Even if the fiber
were absolutely perfect, the signal would be spread across time because light
rays entering at different angles take different length paths and arrives with
different amounts of delay.
The almost complete solution to this problem
is to use hundreds of much smaller fibers in a 1.0mm bundle. Because each fiber
is limited as to what angle of input can enter the fiber, there is far less
variety, and far less dispersion over time. This narrow-aperture effect is
similar to how a pin-hole camera can take a picture without a lens … by letting
in light at only a very limited range of angles, a picture can be taken, whereas
removing the lens from a wider aperture would make photography impossible. Less
light gets through a multi-fiber cable, but the light that does get into the
fibers comes out within in a much smaller time-envelope.
So there is one
problem, the dispersion of light across time … and two avenues towards a better
result: less dispersion in the fiber (better polymers and ultimately quartz),
and less dispersion by filtering the input angle. How simple is that! Listen and
enjoy
- Kaubamärk: AudioQuest
- Saadavus: Laos
AudioQuest Pearl Digital Optical cable is constructed with low-dispersion fibers
and precision polished fiber ends all contained within a black/gray stripe
in-wall rated PVC jacket.
Low-Dispersion Fiber,Low-Jitter (Digital Timing
Errors)
Precision Polished Fiber Ends