Product Engineers

Bruce Clark was interviewed for the NAMM Oral History program during the 2015 Piano Technician Guild’s (PTG) annual convention in Denver, Colorado in July 2015.  During his interview he covered his passion for music and well as his long association with the piano industry.  Much of his design work...
David Cockerell designed one of the earliest synthesizers produced in the United Kingdom. The Synthi was introduced in the late 1960s by EMS Ltd. The unit, which came in a case with a KS keyboard, used patch cords to root reverb and ring modes. David also included two oscillators both with shape...
Jim Coleman Jr. has proudly served as president of the Piano Technicians Guilds (PTG) Board as well as provided classes and training for its members.  He grew up in the industry and followed in his father’s footsteps, who also served the PTG over his long career.  In addition to tuning, Jim Jr....
Jack Cookerly was an accordionist who was among the first to connect the instrument to the technology behind the electronic keyboard. He was chief engineer at Lowrey Organs and designed a number of unique and important advancements for the electronic organ. The resulting efforts can be found in the...
Dave Coontz is a regular sight at NAMM Shows each year behind the counter within the Shubb booth and as it turns out, he played a big part in that company’s success.  Rick Shubb was passionate about playing music since he was a child and as he progressed as a musician there were certain ideas he...
Roger Cox began his career at Ampeg in Linden, NJ.  At Ampeg he served as Vice President of Operations responsible for Quality, Manufacturing, Service, and Research and Development. During his time at Ampeg, Roger fathered the Ampeg SVT which is still in production. After two years at Altec Lansing...
David Cox was a software engineer who decided to create a computer solution for music retailers’ accounting and rental management. David created Tri-Technical Systems, Inc in 1984 and focused on designing software to meet the needs of music stores, which he now admits required more attention than...
Mark Darnell, as a musician, often wondered about the inner workings of the microphones he used, so he set out to learn more and in 1992 was asked to join the Crown International team in the customer service department covering the company’s microphone products. He soon became an expert on the...
Chuck Davies is the founder of American DJ, which provides a long list of innovative products, many of which Chuck designed and engineered. He opened his own audio store in 1979 selling Hi-Fi equipment, which has since branched out to include six locations in Southern California. By 1982, it was...
Les Deutsch is a Jet Propulsion Laboratory (JPL) scientist in the aerospace industry who holds several patents for electronic musical instruments. His father, Ralph Deutsch, invited the sound generator technology for the first digital organ. That instrument, produced by Allen Organ and first shown...

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