Krell Industries Evolution 600, 900, 400 manual Evolution Amplifier Features and Technology

SECTION ONE

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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