The Clear Solution for Source Components
Cardas Clear M Power Cable is George Cardas' smallest
Clear-series AC power cable. It is designed for source components and
other low-current gear.
Clear power cables graduate progressively in size and
degree of filtration from Clear M to Clear to Clear Beyond. According
to George Cardas, "They are essentially progressively more effective as
they increase in size. The filtration is similar in all three cords
using a combination of a toroidal filter and graduated conductor lay
length variation to cancel out-of-band material. The larger cords have
more layers and progressively greater lay length variation."
Clear M provides broadband filtering on all three
legs through a hybrid process that incorporates a tuned toroidal filter
and multipath-canceling conductors in a flexible low resistance package.
This long-awaited power cord is best used on preamps, source
components, and DACs.
"The Mirror of Clear Speaker Cable"
According to George Cardas, "Clear M power cable is
in fact the mirror of Clear Speaker cable. Clear interconnects and
speaker cables are designed to pass the smallest of changes unfettered
by time smear, and this is accomplished by carefully matching the
propagation constants of the cable.
"Clear power cables actually are designed to
deliver smooth 60-cycle power while smoothing out the artifacts,"
George explained. "We achieve this in part by deliberately smoothing the
power signal and muffling the noise circulating in the power system
using a controlled mismatch of signal propagation. Essentially it is the
same core knowledge that is found in Clear signal cables utilized in a
manner appropriate to a power cable."
The following information applies primarily to Clear
audio cables but still provides an insight into the innovative approach
of the Clear series in general.
Cardas Clear Technology
Cardas Clear cables use newly applied technology that
is George Cardas' breakthrough solution to the smeared, unfocused sound
that's inherent in standard cable designs. Cardas Clear uses Matched
Propagation Conductors to deliver what George calls "an unprecedented
window of clarity."
"Clear represents the best of Cardas," reports Alan Sircom in issue 66 of HiFi+
magazine, "so if you are already impressed with Cardas but want more,
Clear could be the first, 'last' upgrade you make, sure in the knowledge
that however high up the audiophile ladder you climb, Clear will be
there, waiting for you to catch up."
Clear technology is scientifically demonstrable. It
presents a 'clear' technical solution to a core problem that is
intrinsic to signal-carrying cables (speaker cables, interconnects,
etc.) and will quite 'clearly' improve the sound of connected hi-fi and
home theater components.
The Trouble is Dielectrics
One problem with standard audio cable designs is that
the cable dielectric (also known as cable insulation) produces an
electrical effect that interferes with the audio signal. While there is
no current flow in dielectric materials, the dielectric accumulates and
releases an electrical charge in response to the current flow in the
conductor, much like the charging and discharging of a capacitor. But
the electrical discharge from the dielectric is out of sync with the
electrical signal in the conductor.
While the electrical signal in the conductor moves at
the speed of light, the charge propagation in dielectric material is
limited to approximately 78 percent of the speed of light. The discharge
of the dielectric lags behind the charge in the conductor, causing a
smearing of low-level information in the cable.
The Lagging Charge Problem
At very high frequencies, cables can appear to
propagate faster because the slower dielectric materials don't have the
time to charge at very high frequencies, and the lag is diminished.
At audio frequencies, however, this lag creates a
noticeable problem. That's why dielectric manufacturers may brag about
what their dielectrics will do at a million cycles per second, but don't
talk about what they do at a thousand cycles per second, where the
negative effects are audible. Jitter is one directly observable artifact
of this conductor/dielectric relationship.
Some cable manufacturers try to compensate for this
differential lagging in a cable by adding an electrical network (for
example, by using a load coil), but the damage has already been done.
Once the low level information in the signal has been smeared, it is
lost and cannot be recovered.
The Matched Propagation Solution
Since the so-called 'charge propagation velocity' of
the dielectric can never equal the speed of electrical changes in the
conductors, George Cardas' ingenious solution with Cardas Clear cables
is to slow the conductor to match the rate of the dielectric.
In a concentrically stranded conductor with
individually coated strands (such as the constant "Q" conductor used in
Cardas cables) the vector velocity and decay time of the conductor can
be matched to that of the dielectric by controlling the lay length
progression (twists per inch or TPI) of successive strand layers.
A matched propagation velocity conductor of this
type, as used in Cardas Clear cables, mitigates the effects of
capacitance much as a load coils do, but it does this continuously in
the cable rather than at intervals. Eliminating the time delay between
storage elements in the cable itself eliminates the bandwidth and
dynamic range limitation seen in periodically loaded cables.
A Huge Dynamic Range of Resolution
Clear has a constant transfer characteristic,
exponentially lower resonance, and a huge dynamic range of resolution.
Its Matched Propagation Conductors maintain low-level information and
natural transients in a way that no other cable can. It does not
exaggerate the leading edge of the signals or smear low-level
information as conventional conductors do. Clear maintains the overall
time signature of the original sound elements making it easier to pick
out what George Cardas calls "the head in the choir or the emotion in
the individual voice."
The insights and technology in all the Cardas Clear
cables brings a new level of clarity and realism to your listening