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Krell Current Tunnel 3
Revolutionary Krell CAST Technology
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 circuitry with existing Krell Current Mode
technology to create entire CAST systems that reproduce music with incredible range,
tonality, and precision.
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: A New Approach
CAST circuitry recognizes signal transmitted in the current domain instead of the
voltage domain between each component. CAST transmission unifies individual
components and their interconnects into an electrically linked whole. The sonic
presentation of the entire system remains intact.
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 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 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 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 CAST preserves
the transmitted signal between components. Together, CAST and Krell Current Mode
technologies unify separate Krell components into a single global circuit.
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 components and are aesthetically 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 developed for every CAST cable
made.