Download Krell Audio Components KCT

Krell Audio Components KCT
03/13/2007 04:44 PM
The Krell Current Tunnel (KCT)
CAST stereo preamplifier holds the
distinction of being the finest
sounding, most technologically
advanced, and most system friendly
stereo preamplifier ever designed by
Krell. Using CAST technology and
power supply regulation that is a
direct result of the development of
the Master Reference Amplifier, the
KCT is able to deliver a usable
bandwidth that extends to 1.5 MHz.
The result is seamless, transparent
musical reproduction of even the
most dynamically demanding
sources.
FEATURES
The KCT derives its name from the way the signal is routed from
its input to its output. The signal is brought into the KCT in the
current domain from a CAST source, for example from the new
Evolution 505 SACD/CD Player. The signal stays in the current
domain as it travels through the KCT, protected from extraneous
noise and unwanted signal interference as if it were in a tunnel.
Ease of operation is also accounted for in equal measure with
features that include dual-zone operation, with independent
volume controls, Theater Throughput for integration into home
theater systems, and RS-232 controls for whole house
automation. The KCT is a stereo preamplifier that delivers the
ultimate stereo performance today and the opportunity for
continued growth into the future.
The power supply regulation is directly descended from the
Master Reference Amplifier. Sixteen independent regulators, each
closely coupled to the current tunnel gain stages, deliver
seamless, transparent reproduction of the most dynamically
demanding sources.
CAST
Current Audio Signal Transmission (CAST) is a proprietary Krell
circuit technology for connecting analog components, in which
the audio waveform is transmitted between components in
current rather than voltage domain. Deceptively simple in
concept, CAST reverses conventional wisdom that says voltage
transfer from source to load demands that a preamplifier's
output be low impedance and that the power amplifier's input be
high. Unfortunately, this combination places a large burden on
the connecting cable in that its impedance will alter or distort the
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Krell Audio Components KCT
03/13/2007 04:44 PM
the connecting cable in that its impedance will alter or distort the
signal voltage operating the amplifier. In contrast, CAST
transfers current rather than voltage from a high impedance
source to a low impedance load. In doing so, a cable's effect is
minimized, if not totally eliminated, as its impedance
characteristic becomes but a minute portion of the total
interface. CAST results in far simpler and far more accurate
signal transfer. It unveils musical subtleties as it immunizes a
system against cable-induced variables. Krell components
connected via CAST perform as if they are all part of a single
unit yielding astounding levels of accuracy and realism.
Building on the proven merits of Krell Current Mode circuitry,
current tunnel topology provides extraordinary bandwidth and
phase accuracy. These attributes empower the KCT with the
ability to preserve the soul of a musical performance by correctly
presenting the complex harmonic structures originally generated
by the instruments themselves. By logarithmically extending the
usable bandwidth to 1.5 MHz, Krell engineering overcomes the
amplitude and phase variations that plague voltage-based
designs.
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