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Krell iBias Class A technology allows our latest amplifiers
to run in full Class A mode to full power while minimiz-
ing heat generation.
All signal gain is realized in the current domain using dis-
crete, proprietary, multiple-output current mirrors with
extraordinary open loop linearity. There are no generic
integrated circuits or op amps used anywhere.
Current mirrors in the final gain stages use a new output
power device that operates at a 73% higher voltage,
delivers almost 10% more current, and offers 120 watts
of additional power handling capability as compared to
previous devices.
The signal path is fully complementary and balanced .
Independent complementary pre driver and driver
stages for the positive and negative output transistors
make the output stages extremely fast and linear.
Krell amplifiers are fully direct-coupled, with no capaci-
tors in the audio signal path. This design gives the Krell
amplifiers lower internal impedance, which allows
firmer, more precise control of your speakers. P P
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Two 750VA toroidal transformers feed amplifier modules that
include the audio circuitry, rectifier, and power supply filter-
ing mounted to an individual heat sink.
This design shortens the electrical path from the power sup-
ply to the output transistors, reducing the overall impedance
and allowing the circuit to respond faster and control the
speakers better and more accurately. Featur e e
H
Highligh t
ts
Network connectivity brings convenience, monitoring, and
reporting to end users from any smartphone, tablet, or lap-
top.
Amplifier configuration options include display brightness
and timeout. For energy conservation, the amplifiers can be
programmed to power off at a preset time of inactivity.
Individual channels can be muted and firmware updates can
be initiated from the web server.
Excessive current, output DC, fan speeds, short circuit, and
overheating are all monitored in real time. Messages are dis-
played on the front panel and reported on the web server
interface. Additionally. end users can be sent an email notify-
ing them of any operational anomalies.
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DESIGN
SPECIFICATIONS
Krell ®is a registered trademark of Krell Industries, LLC., and is restricted for use by Krell Industries LLC., its subsidiaries, and authorized agents. All other trademarks and trade names are
registered to their respective companies. © 2014 by Krell Industries, LLC. All rights reserved.
THE LEADER IN AUDIO ENGINEERING Krell Industries,
LLC. - 45 Connair Road - Orange, CT 06477-3697 USA
Tel: 203-298-4000 - Fax: 203-799-9796 - Sales Dept: 203-298-4010 - contact@krellonline.com - www.krellonline.com
All operational features, functions, specifications, and policies are subject to change without notice.
Krell iBias Class A amplifiers are the first to deliver the rich musicality of Class A amplifiers, the uncompromised dynamics
of classic Krell amplifiers, and the efficiency and low power consumption of Class G and H amplifiers.
DUO 300
300 WATT STEREO POWER AMPLIFIER
