Krell cast

Used, but as new. 
GENUINE KRELL ORIGINAL!

Krell CAST

Current Audio Signal Transmission

CAST (Current Audio Signal Transmission) is 
a proprietary technology by Krell Industries, LLC that effectively 
combines the signal gain stages of components connected in CAST into one 
gain block. CAST technology virtually eliminates the noise and 
distortions created from the use of multiple voltage gain stages. A 
Krell system connected in CAST transfers the signal in the current 
domain, throughout the signal path to the amplifier output stage where 
only one current to voltage conversion (I-to-V) takes place. CAST 
enabled products include a transmitter and receiver circuitry that 
transfers current from an extremely high output impedance (source) to a 
low-impedance input (load), minimizing the cable's effect on signal 
transmission.

CAST technology expands the usable 
audio signal bandwidth well over 2 MHz; ensuring harmonic reflections 
are virtually immeasurable in the audible frequency range. CAST allows 
signal transmission over extended lengths of interconnect cable, 
allowing flexible placement for your components, without signal 
degradation.

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 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, 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 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. Krell Current Mode technology enjoys bandwidth increases up to 
an order of magnitude greater than their voltage based counterparts. 
This dramatic increase in circuit bandwidth delivers near perfection in 
the audible band that typically suffers from phase distortions in 
voltage circuits.

Evolution CAST

By employing radical current mirror circuitry, the Evolution components 
elevate the CAST technology to another level. This advanced use of the 
technology increases the linearity, transient speed, and bandwidth of 
the Evolution components while reducing the distortion by an order of 
magnitude.

The Best Musical Performance

When 
you operate a CAST system, you will hear significant improvements in 
every performance 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 musical event for you, using the full expression of 
technology to date.