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The replacement was the MT series. The 31T is still in production today for general signaling purposes. In March, 2006, Wheelock, Inc was acquired by Cooper Industries. Cooper Wheelock also produces several bells as well as speakers, synchronization modules, booster power supplies, [2] chimes and voice evacuation
The AWMS-1 consisted of an AM/FM radio, cassette player, two 2-inch tweeters, and a four-inch woofer. [2] In 1987, Amar Bose and William Short won the Inventor of the Year award from Intellectual Property Owners for the waveguide loudspeaker system. [3] [4] A model with a CD player was added in 1992.
The "3-2-1 GS" model was introduced in 2003, named for its use of Bose "Gemstones" small speakers, which have two drivers pointing forward and one pointing to the side. [2] [3] The 3-2-1 was replaced by the "321 Series II" in 2004, which included two small speakers and a subwoofer. [4]
A tweeter or treble speaker is a special type of loudspeaker (usually dome, inverse dome or horn-type) that is designed to produce high audio frequencies, typically up to 100 kHz. The name is derived from the high pitched sounds made by some birds (tweets), especially in contrast to the low woofs made by many dogs , after which low-frequency ...
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Originally conceived as a domestic hi-fi speaker, the NS-10 was designed by Akira Nakamura and launched in 1978. [2] [3] While the speaker was poorly received, recording engineers came to rely on the NS-10 as a benchmark. The model was discontinued in 2001. [2] The NS-10 was recognised for its ability to reveal shortcomings in recordings. [4]
Yamaha NS-2000 Speaker, rear panel cable terminals. Yamaha NS-2000 Speaker, front with cover attached. First produced in 1982, the Yamaha NS-2000 is an improved version of the older NS-1000 speaker that was first made in the early to mid-1970s. Like the NS-1000, it is a 3-way acoustic suspension speaker system with a beryllium-dome midrange and ...
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