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A speaker with an efficiency of 100% (1.0) would output a watt for every watt of input. Considering the driver as a point source in an infinite baffle, at one metre this would be distributed over a hemisphere with area 2 π {\displaystyle 2\pi } m 2 for an intensity of 1 / ( 2 π ) {\displaystyle 1/(2\pi )} = 0.159155 W/m 2 .
Loudspeaker enclosures range in size from small "bookshelf" speaker cabinets with 4-inch (10 cm) woofers and small tweeters designed for listening to music with a hi-fi system in a private home to huge, heavy subwoofer enclosures with multiple 18-inch (46 cm) or even 21-inch (53 cm) speakers in huge enclosures which are designed for use in ...
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
The Yamaha XS650 is a mid-size [2] motorcycle that was made by the Yamaha Motor Company. The standard model was introduced in October 1969, and produced until 1979. The "Special" cruiser model was introduced in 1978 and produced until 1985. The XS650 began with the 1955 Hosk SOHC 500 twin. After about 10 years of producing 500 twin, Hosk ...
The Yamaha T-150 is an underbone model manufactured by Yamaha Motor Company since 2015. It is marketed under the names Exciter 150 / 155 in Latin America, Thailand and Vietnam, Sniper 150 MXi in the Philippines and Singapore, Jupiter MX/MX King 150 in Indonesia and Iran, and Y15ZR / Y16ZR in Malaysia.
That year, Harley-Davidson, fearful of the inroads in the US market made by the Virago and other new Japanese cruiser-style motorcycles, pushed for a tariff on imported bikes over 700 cc. [1] [2] Yamaha replaced the 750 cc engine with a 699 cc version to avoid the tariff, while the 920 cc engine grew to 981 cc (XV1000), and later 1063 cc (XV1100).
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