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Krell FBI
Current Audio Signal Transmission, termed CAST, is a revolutionary
method of connecting analog audio components for unparalleled sonic
performance. Innovative engineering combines the new Krell CAST cir-
cuitry with existing Krell Current Mode technology to create entire
CAST systems that reproduce music with incredible range, tonality,
and precision.
The 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 independ-
ently. Each component is unaware of the other components in the sys-
tem. The cables that connect the components also have their own
electrical characteristics, which affect the sonic presentation of the
entire system. CAST transmission unifies individual components and
interconnects into an electrically-linked whole. The original signal
remains unaltered from source to speaker.
CAST Basics
Here is how a CAST audio system works. Internally, each CAST source
transfers, or amplifies, current using Krell Current Mode circuitry. This
current signal is then output using CAST circuitry. 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 musi-
cal signal in the current domain from beginning to end, an entire CAST
system behaves as if it is one component. With CAST, circuit board
properties and signal transmission aberrations 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 be-
tween components, its origin stems from Krell Current Mode, the tech-
nology developed to transfer the musical signal within a component.
CAST combined with Krell Current Mode takes circuitry signal trans-
mission to the next evolutionary level. In essence, Krell Current Mode
Revolutionary Krell CAST Technology
