Section One: Evolution Amplifier Features And Technology - Krell Industries Evolution 400 Owner's Reference Manual

ONE
SECTION
Evolution Amplifier Features and Technology
This section describes the innovative features and technology of the Evolution
Series amplifiers, and defines CAST and other key terms used in this reference.
There are six amplifier models in the Evolution Series: the 302 Stereo Power
Amplifier, the 402 Stereo Power Amplifier, the 403 Three-channel Power Amplifier,
the 400 Monaural Power Amplifier, the 600 Monaural Power Amplifier, and the 900
Monaural Power Amplifier. The compact chassis of the 400 Monaural Power
Amplifier contains all of the high power, wide bandwidth, and low noise character-
istics designed into all Evolution Series amplifiers.
Features
Evolution Series amplifiers are designed with a signal path that incorporates Krell
Current Mode and CAST circuitry.
All amplifiers feature massive power supplies. The power supply makes use of
extensive electrical and magnetic shielding to keep radiated interference out of
critical amplifier circuits.
The Evolution 302 design utilizes a 3000 VA power supply. The Evolution 402 and
Evolution 600 are equipped with a 5000 VA power supply, and the Evolution 403
and Evolution 900 house 6000 VA power supplies.
Internal high-current line conditioning circuitry filters RF noise on the AC mains, as
well as compensating for asymmetrical power waveforms and DC on the mains.
Advanced microprocessor control monitors critical operational parameters. Output
current, DC offset, rail voltages, and operating temperature are all continuously
monitored.
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