Introduction
W
elcome to the Jeff Rowland Design Group “family” and congratulations on your purchase of what is unquestionably
one of the world’s finest audio amplifiers. þ With its combination of industrial grade active and passive devices,
precision electronic circuitry and accurately machined chassis components throughout, your Concentra Integrated
Amplifier will offer you many years of musically satisfying enjoyment. þ Please take a few moments to read the
remainder of this Owner’s Manual. A thorough understanding of the operational features will allow you to gain the
maximum performance and ease of use for which this Amplifier was designed. þ Your Amplifier’s serial number is
located on the rear panel and also recorded below. Please include this number with any correspondence regarding your
Concentra Integrated Amplifier. þ It has been my joy to create an audio component of enduring value which will reflect
a higher ideal of musical and artistic expression. It is my hope that these qualities will enrich your experience of
ownership.
Enjoy the music!
Jeff Rowland
President
þ Jeff Rowland Design Group, Inc.
2911 North Prospect Street
Colorado Springs, CO 80907
Phone: 719/473-1181
Fax: 719/633-4158
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