A Letter from Dan D’Agostino
Dear Audio Enthusiast,
Thank you for your purchase of the Evolution Two preamplifier.
My new Evolution products represent a watershed in my design philosophy and in my quest for audio components that deliver absolute truth in music reproduction. The expanse of the Evolution Two monaural design has allowed me to explore fully the advantages of current mode topologies. The resulting circuit utilizes no feedback and has a bandwidth of 2 MHz.
I have always been fascinated by the artistry inherent in great musical performanc- es, and my new Evolution Two preamplifier delivers the these performances in their entirety, unaltered, to the amplifier. At the same time, the Evolution Two pre- amplifier provides the flexibility and control necessary for the listener to thoroughly enjoy a high performance audio system. It is my pleasure to make the Evolution products available to you.
The preamplifier plays a vital role in audio playback. At no other point in the repro- duction process is the music so vulnerable to change. The signal level at the pre- amplifier stage is small, and is particularly susceptible to noise and distortion. In order to solve this problem, the Evolution Two employs Krell Current Mode gain stages from input to output, and Current Audio Signal Transmission (CAST) receivers and transmitters. Unprecedented in Krell design history, these unique topologies combine in the Evolution Two preamplifier to form a circuit that has no audible sonic signature.
The Evolution Series represents a new direction for Krell, where breakthrough cir- cuit topologies also represent the vanguard in convenience and control. Sophisti- cated communication circuitry allows from two to eight preamplifiers to be linked to a single master from which all user interface is accomplished. The Evolution Two Monaural Preamplifier is designed to complement perfectly the Evolution One Monaural Power Amplifier. Combine the Evolution One and Two with my new
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