6
SECTION
ONE
Evolution e Series Amplifier Features and Technology
This section describes the innovative features and technology of the Evolution e Series
amplifiers, and defines CAST and other key terms used in this reference. There are seven
amplifier models in the Evolution e Series: the 302e Stereo Power Amplifier, the 402e
Stereo Power Amplifier, the 2250e Stereo Power Amplifier, the 403e Three-channel Power
Amplifier, the 3250e Three-channel power Amplifier, the 400e Monaural Power Supply, the
600e Monaural Power Amplifier, and the 900e Monaural Power Amplifier.
Features
Evolution e Series 302e, 402e, 403e, 400e, 600e, and 900e 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 302e and Evolution 400e are equiped with a 3000 VA power supply. The
Evolution 2250e and Evolution 3250e are equipped with a 2500 VA power supply. The
Evolution 402e and Evolution 600e are equipped with a 4400 VA power supply, and the
Evolution 403e and Evolution 900e 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. In the event of a
problem, the power staus indicator will flash, indicating a potential fault.
