Revolutionary Krell CAST
and CAST II Technology
Current Audio Signal Transmission, termed
CAST, is a revolutionary method of connecting
analog audio components for unparalleled
sonic performance. CAST circuitry, and the
CAST circuitry update, Krell CAST II, combine
innovative engineering with existing Krell Cur-
rent Mode technology to create entire CAST
systems that reproduce music with incredible
range, tonality, and precision.
CAST, anomalies of signal transmission between
components are eliminated. Cable impedances
and their effects on the transmitted signal are
non-existent.
How CAST and Krell Current Mode Interact
While CAST is a new method of transferring the
musical signal between components, its origin
stems from Krell Current Mode, the technology
developed to transfer the musical signal within
a component. CAST combined with Krell Cur-
rent Mode takes circuitry signal transmission to
the next evolutionary level. In essence, Krell
Current Mode maintains the integrity of the sig-
nal within the component and CAST preserves
the transmitted signal between components.
Together, CAST and Krell Current Mode tech-
nologies unify separate Krell components into a
single global circuit.
Voltage Signal Transmission
and the Traditional Audio System
Traditionally, signal is transmitted in the voltage
domain between two components. In an audio
system, each component is a discrete entity with
unique characteristics that act upon the musical
signal independently. Each component is
unaware of the other components in the system.
The cables that connect the components each
have their own electrical characteristics, which
affect the sonic presentation of the entire sys-
tem.
CAST Cable Construction
A CAST system uses cables manufactured by
Krell and other manufacturers specially
licensed by Krell. Thin and flexible CAST
cables are constructed with the same build
quality as other Krell products and are aesthet-
ically matched to the components that Krell
manufactures. An all-metal body and locking
connectors with gold contacts are part of the
standard no-compromise specification devel-
oped for every CAST cable made.
CAST: A New Approach
CAST circuitry recognizes signal transmitted in
the current domain instead of the voltage
domain between each component. CAST
transmission unifies the individual components
and their interconnects into an electrically
linked whole. The sonic presentation of the
entire system remains intact.
CAST Basics
The Best Musical Performance
Here’s how a CAST audio system works. Inter-
nally, each CAST source transfers, or amplifies,
current using Krell Current Mode circuitry. This
current signal is then output using CAST cir-
cuitry. When the signal is received by a CAST
input, Krell Current Mode circuitry again takes
over until the signal reaches the loudspeaker.
By maintaining the musical signal in the current
domain from beginning to end, an entire CAST
system behaves as if it is one component. With
When you operate a CAST system, you will
hear significant improvements in every perfor-
mance area: speed, precision, dynamic range,
depth and width of the sound stage, transient
impact, tonal balance, harmonic distortion, and
more. The goal for CAST is the same company
goal used for all Krell products. Krell strives for
the delivery of the best performance of a musi-
cal event for you, using the full expression of
technology to date.
Krell Full Power Balanced X Series Power Amplifiers
3
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