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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 ...
Subwoofers received a great deal of publicity in 1974 with the movie Earthquake, which was released in Sensurround. Initially installed in 17 U.S. theaters, the Cerwin-Vega "Sensurround" system used large subwoofers that were driven by racks of 500 watt amplifiers, triggered by control tones printed on one of the audio tracks on the film.
New MxL608 Lowers Cost of DVB-T, DTMB TV and STB Designs New low-cost "super radio" features best-in-class sensitivity performance, power consumption and interference rejection CARLSBAD, Calif ...
These subwoofers eventually paved the way for JL Audio's entrance into the realm of home audio. New Evolution, Stealthbox, enclosed subwoofer systems, and amplifier models are introduced, as well has the High Output H.O. Wedge enclosed subwoofer systems and the 500/5 Slash amplifier. In 2002, W6v2 subwoofers are added to the line. [3]
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 .
Broad frequency range (100 – 18000 Hz for 0.6m 2 panel). The air radiation resistance is small and constant with frequency. This means that directivity is not affected by size of speaker. [8] Bipolar (radiates sound in 2 directions), but may be made forward directed.
A Maryland Senate panel voted Monday night to support a Republican nominee to the state elections board to replace a previous board member who resigned this year when he was charged with ...
The bass rolloff 3db point occurs when the narrowest panel dimension equals a quarter wavelength of the radiated frequency for dipole radiators, so for a Quad ESL-63, which is 0.66 meters wide, this occurs at around 129 Hz, comparable to many box speakers (calculated with the speed of sound taken as 343 m/s).