Edward M. Long (1932 – December 17, 2016) was an audio engineer known for introducing the first near-field

studio monitor Studio monitors are loudspeakers in speaker enclosures specifically designed for professional audio production applications, such as recording studios, filmmaking, television studios, radio studios and project or home studios, where accurate ...

s and the first Time-Aligned

loudspeaker A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A ''speaker system'', also often simply referred to as a "speaker" or ...

crossover Crossover may refer to: Entertainment Albums and songs * ''Cross Over'' (Dan Peek album) * ''Crossover'' (Dirty Rotten Imbeciles album), 1987 * ''Crossover'' (Intrigue album) * ''Crossover'' (Hitomi Shimatani album) * ''Crossover'' (Yoshino ...

. In 2021, Ed Long was inducted into the

TEC Awards The TEC Awards is an annual program recognizing the achievements of audio professionals. The awards are given to honor technically innovative products as well as companies and individuals who have excelled in sound for television, film, recordings, ...

Technology Hall of Fame for his development of the concept of near-field monitoring.

Career

Long was born in

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. During the Korean War he taught pulse techniques, multiplexing and FM theory at Fort Monmouth Signal School. He completed his engineering studies at Fisher College in 1957. Long became a project engineer at Sylvania Home electronics and did design work on loudspeaker systems there and also at Audio Dynamics Corporation. He later became senior acoustics engineer at C.T.S. of Paducah, Inc., where he assisted in the manufacture of loudspeaker systems. In 1968 he joined Ampex Corporation as a senior acoustics engineer. In 1972 he moved to Northern California and formed Calibration Standard Instrument, a consulting firm and manufacture of loudspeaker systems. Long developed a passive crossover for loudspeakers which aligned the bandpasses in time. Invented and trademarked in 1976 as "Time Alignment", the crossover design was influential in loudspeaker development from the late 1970s throughout the 1980s. Long and Ronald J. Wickersham developed and patented a method for extending low-frequency response of a loudspeaker Bag End Licensed and implemented the patent into

subwoofer A subwoofer (or sub) is a loudspeaker designed to reproduce low-pitched audio frequencies known as bass and sub-bass, lower in frequency than those which can be (optimally) generated by a woofer. The typical frequency range for a subwoofer is ...

. products known as ELF speakers.

Personal life

Long retired in 2003. He died on December 17, 2016, at his home in

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, at the age of 84.

References

* AES E-Library, Design Parameters of a Dual Woofer Loudspeaker System, Author: Long, Edward M Affiliation: Consumer Equipment Division, Ampex Corporation, Elk Grove Village, IL, JAES Volume 17 Issue 5 pp. 515–524; October 1969 http://www.aes.org/e-lib/browse.cfm?elib=1559 * Method and apparatus for operating a loudspeaker below resonant frequency, United States Patent 4481662 {{DEFAULTSORT:Long, Ed 1932 births 2016 deaths American acoustical engineers American electrical engineers People from Oakland, California Engineers from California