Krell Industries Stereo Amplifier WCES 2005 User Manual

WCES 2005 - New Product Announcement  
Two megahertz open loop  
Housed in a separate chassis,  
the power supply makes use of  
extensive electrical and mag-  
netic shielding to keep radiated  
interference out of critical pre-  
amplifier circuits.  
bandwidth in a zero feedback,  
balanced, Krell Current Mode  
and CAST circuitry design.  
The Evolution Two  
Monaural  
Preamplifier  
To eliminate loading effects,  
single-ended and balanced volt-  
age inputs drive a dynamically-  
cascoded JFET buffer, which  
has tremendous open-loop line-  
arity and very high input imped-  
ance.  
Each monaural preamplifier has  
a power supply capability equivalent  
to many stereo power amplifiers.  
A 170 VA toroidal transformer  
drives four 8-amp bridge rectifi-  
ers and 39,600 microfarads of  
filter capacitance.  
All signal gain is realized in the  
current domain using proprie-  
tary multiple-output current  
mirrors with nearly 500 times  
the open loop linearity of other  
designs.  
A new Krell-designed digital  
control circuit monitors and  
optimizes the preamplifier’s  
operating parameters.  
Negative feedback is not used  
anywhere in the preamp be-  
cause it is not necessary. Open-  
loop distortion is typically less  
than 0.005% (50 parts per mil-  
lion).  
Any number of preamplifiers  
may be linked and controlled  
from a single master, making  
high quality, multi-channel au-  
dio systems a reality for the  
first time.  
The volume control is realized  
with a 16-bit balanced resistor  
ladder — bandwidth and tran-  
sient response of the preamp  
circuitry are virtually unaffected  
by the volume setting.  
Offered in diamond-cut silver or  
luxurious black finish.  
The Evolution Series  
Expressed through a combination  
of breakthrough technologies and  
inspired vision, the Evolution Two  
Preamplifier and Evolution One  
Power Amplifier culminate more  
than 25 years of industry lead-  
toxicating detail and startling dynamics.  
Like live music, this effortless power and  
Savor  
a totally new  
listening experience...  
instant response elicit a visceral response  
that engages all the senses. Yielding phe-  
nomenal power in the most refined man-  
ner imaginable, the Evolution system is a  
synthesis of almost impossible contradictions; a unique blend of  
beauty, grace, and power.  
ing audio design. The relentless pursuit of the most realistic  
music reproduction is at the heart of Krell design, and this  
heart beats strongest in the Evolution. The Krell trademark is  
synonymous with music reproduction that fills a room with in-  
Krell Industries, Inc. 45 Connair Road, Orange CT 06477-3650  
203-799-9954 FAX 203-891-2028 krell@krellonline.com www.krellonline.com  
Krellis a registered trademark of Krell Industries, Inc., and is restricted for use by Krell Industries, Inc., and authorized agents. CASTTM and Krell Current ModeTM are trademarks of Krell Industries, Inc. All other trademarks and trade names  
are registered to their respective companies. © 2004 by Krell Industries, Inc. All rights reserved.  
 

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