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 preamplifiers. þ With its combination of industrial grade active and passive devices,
precision electronic circuitry and accurately machined chassis components throughout, your Synergy Preamplifier will
offer you many years of musically satisfying enjoyment. þ Please take a few moments to read the remainder of this
Owner’s Manual. þ A thorough understanding of the operational features will allow you to gain the maximum
performance and ease of use for which this Preamplifier was designed. þ Please note that your Preamplifier must be
used with its companion Power Supply. þ The serial number of each component is located on the rear panel of each,
and also recorded below. þ The Preamplifier serial number begins with the letter S and the Power Supply serial
number begins with the letter R. þ Please include these numbers with any correspondence regarding your Coherence
Preamplifier. 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. þ 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