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John Ulrick - Stereophile.com
https://www.stereophile.com/content/john-ulrick
John Ulrick - Positive Feedback
https://positive-feedback.com/audio-discourse/mourning-one-of-our-industrys-founding-fathers-john-ulrick/
Today I mourn the passing of a good friend and one of the men who helped found the high-performance audio industry, John Ulrick. Hired as a Circuit Design Engineer at Litton Industries right out of college to work with the Air Data Group, …
Mourning One of Our Industry's Founding Fathers, John Ulrick
https://positive-feedback.com/Issue79/ulrick.htm
audio industry, John Ulrick. Hired as a Circuit Design Engineer at Litton Industries right out of college to work with the Air Data Group, John started designing servo circuits for the North American XB-70's Mach number computer in 1962. It was …
The History Of Infinity – Aural Hifi
https://auralfetish.com/pages/infinity
THE HISTORY OF INFINITY Founded in 1968 by Arnie Nudell, John Ulrick and Cary Christie, Infinity has produced home and mobile audio products by employing innovative materials such as neodymium magnets, mylar diaphragms, and polypropylene cones.
John Ulrick- Spectron - RIP
https://www.audioshark.org/general-audio-discussion-15/john-ulrick-spectron-rip-7613.html
RME Audio ADI-2 DAC FS, ModWright Ultimate Sony XA-5400ES. Burmester 948, McIntosh MCLK12, Kimber Kable, Siltech, Cardas, Avanti Audio cables. June 7, 2015, 04:10 AM #4
Other Infinity - David's Audio
https://davidsaudio.com/html/other_infinity.html
Cary Christie: from Infinity to Artison - Stereophile.com
https://www.stereophile.com/content/cary-christie-infinity-artison
Arnie Nudell: RIP – PS Audio
https://www.psaudio.com/copper/article/arnie-nudell-rip/
Infinity - David's Audio
https://davidsaudio.com/html/infinity_.html
It was originally developed in a garage by Arnie Nudell, Cary Christie, and John Ulrick. Arnie and John were aerospace designers for Litton in Southern California. It was a unique design for the time in that it used a servo controlled 18” woofer from Cerwin Vega (massive, as you can see by the Coke can in the picture below).
Spectron Audio Out Of Business? - Audiogon Discussion Forum
https://forum.audiogon.com/discussions/spectron-audio-out-of-business
John Ulrick of Spectron Audio passed away a few years ago. I don’t know if his widow is still alive to inquire about spec design sheets. She ran the front office unit of the business. I think an business partner took over and shuttered the operation. Deltronics (on N. Halsted St. in Chicago) has a solid reputation.
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