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A Letter from Dan D’Agostino
Dear Audio Enthusiast,
Thank you for your purchase of the Evolution One.
The Evolution One Monaural Power Amplifier represents a watershed in my design
philosophy and in my quest for amplifiers that deliver absolute truth in music
reproduction. This new amplifier operates solely in the current domain, with only
one voltage gain stage at its output. I have always been fascinated by the artistry
inherent in great musical performances, and I believe that no component in an
audio system equates more closely to the full range of musical expression than
the power amplifier. The Evolution One reproduces real-life dynamics and trans-
parency in a manner that I have not experienced prior to this design. It is my
pleasure to make it available to you.
Krell amplifiers are best known for their ability to drive any loudspeaker to sound
its best, without regard to impedance or efficiency. The Evolution One amplifier
joins this awesome current capability with a new, ultra-linear circuit topology. It is a
strong belief of mine that linearity, an amplifier’s ability to output an exact dupli-
cate of the input signal, is the ultimate measure of that amplifiers worth. I drive
Krell amplifier designs toward the common goal of linearity; through the rigorous
application of Krell design principles that focus our efforts on four major perform-
ance factors: distortion, bandwidth, output impedance and current capability. The
Evolution One excels in each of these areas, delivering absolute accuracy from
extremely low levels of output, virtually at preamplifier levels, to astounding, awe-
inspiring amounts of power.
As the foundation of my new Evolution Series, the Evolution One Monaural Power
Amplifier is designed to complement the Evolution Two Monaural Power
Preamplifier perfectly. Combine the Evolution One and Two with my new LAT-1000
loudspeakers, and experience the extraordinary capabilities of the Evolution
System.
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