[4] Their primary products are loudspeakers and associated audio electronics for professional, home, automotive and multimedia applications.

[5] Engineers at Western Electric, who later formed Altec Services Company, developed the technology for motion picture sound that was introduced in 1927, with the release of The Jazz Singer.

Named Electrical Research Products, Inc. and commonly referred to by the acronym ERPI, it became the target of an anti-trust suit brought by Stanley K.

Hilliard immediately recruited Lansing Manufacturing, Robert Stephens, a design draftsman on MGM's staff, and Harry Kimball.

[citation needed] The most often used Voice of the Theatre system was the A-4, many of which are still in use in motion picture theaters measuring 9 feet tall .

[citation needed] The efficiency of all of these products originally provided high sound pressure levels from the limited amplifier power available at the time.

In 2004, the A-7 Voice of the Theatre system was inducted into the TECnology Hall of Fame, an honor given to "products and innovations that have had an enduring impact on the development of audio technology.

By the time James Ling spun Altec Lansing off in 1974, his company, LTV-Ling-Altec, had heavy debts.

The Altec Lansing Corporation was formed by Gulton Industries as part of the purchase and headquartered in Oklahoma City, the site of the University Sound factory built by Jimmy Ling when he moved there from White Plains, New York.

Prior to the purchase, Altec Lansing had been headquartered in Yorba Linda, California, but it was moved as part of an effort to reduce operating costs.

[citation needed] On 30 April 2001 Altec Lansing Technologies launched their first line of headphones named as the AHP series.

[17] In February 2004, Altec Lansing Technologies reissued a number of loudspeakers starting with the A7 Voice of the Theatre, manufactured in the US with some changes to the enclosure.

[20] On 1 October 2009 Altec Lansing LLC announced that it was to be acquired by Prophet Equity for approximately 18 million dollars.

[21] In July 2011, Altec Lansing LLC announced the opening of new West Coast headquarters in San Diego, California.

[22] On October 18, 2012, The Infinity Group bought Altec Lansing for $17.5 million at auction thus saving the company from bankruptcy.