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Tannoy Ltd is a Scotland-based manufacturer of loudspeakers and public-address (PA) systems. The company was founded by Guy Fountain in London, England as Tulsemere Manufacturing Company in 1926, but has been based in Coatbridge, Scotland, since the 1970s. Since 2002 it has been a part of the Danish-based TC Group (TC Electronic, TC-Helicon, Lab.gruppen, Lake, TC Applied Technologies and White Acoustics). 
The name Tannoy is a syllabic abbreviation of tantalum alloy, which was the material used in a type of electrolytic rectifier developed by the company. The brand was trademarked by 10 March 1932, on which date the Tulsemere Manufacturing Company formally registered as Guy R. Fountain Limited.
It became a household name as a result of supplying PA systems to the armed forces during World War II, and to Butlins and Pontins holiday camps after the war. Identification being such because the company logo name was prominently shown on the speaker grills. This usage is current as of mid-2010. Tannoy is famous for its 'Dual Concentric' speaker design, which places the tweeter behind the centre of the medium or bass driver. 'Dual Concentric' is a trademark although Tannoy is not the only speaker manufacturer to design coaxial speakers.
Tannoy's image is particularly linked to studio monitors on the one hand and its Prestige range of home speakers on the other. Prestige speakers use Dual Concentric cone speakers and are easily recognisable by their 'vintage' design.
The term 'tannoy' is often used generically in colloquial English throughout the British Commonwealth to mean any public-address system or even as a verb - to "tannoy", particularly those used for announcements in public places; although the word is a registered trademark, it has become a genericised trademark. The company's intellectual property department keeps a close eye on the media. To preserve its trademark, it often writes to publications that use its trade name without a capital letter or as a generic term for a PA system.
- TC Group - Brand Overview
- "Goldtrail collapse leaves Britons in Greece and Turkey". BBC News. 17 July 2010.
- BBC World Service broadcast 27 February 2010 referring to the use of "Tannoys" in warning seaside dwellers to evacuate to higher ground due to a possible tsunami caused by the Chilean earthquake of that day (heard on WNYC FM)
- Longman Dictionary of Current English online, 14 March 2012 http://www.ldoceonline.com/dictionary/tannoy Missing or empty
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Home and Studio speakers:
- Plus Series
- 70Anniversary Series
- Surrey Series
- Gold Series
- Definition Series
- Eclipse Series
- Mercury Series
- Prestige Series
- Classic Monitor
- K3838 monitor kit (similar to Classic Monitor)
- Super Red Monitor
- K3808 monitor kit (similar to Super Red Monitor)
- Little Red
- Sixes Series
- Profile Series
- Precision Series
- Revolution Series
- Dimension Series
- Eyris Series
- System DMT
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