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Revolutionary Krell CAST Technology
Current Audio Signal Transmission, termed CAST, is a revolutionary method of con-
necting analog audio components for unparalleled sonic performance. Innovative
engineering combines the new Krell CAST circuitry 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 independently. Each component is unaware of the
other components in the system. 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’s 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 loud-
speaker. 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 CAST,
circuit board properties and signal transmission aberrations between compo-
nents are eliminated. Cable impedances and their effects on the transmitted sig-
nal are non-existent.
How CAST and Krell Current Mode Interact
While CAST is a new method of transferring the musical signal between compo-
nents, its origin stems from Krell Current Mode, the technology developed to
transfer the musical signal within a component. CAST combined with Krell Current
Mode takes circuitry signal transmission to the next evolutionary level. In essence,
Krell Current Mode maintains the integrity of the signal within the component and
