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Germain Amphitheater (originally Polaris Amphitheater) was a 20,000-seat outdoor entertainment venue located in Columbus, Ohio, near the suburb of Westerville. The venue opened as part of a large development venture off of Interstate Highway I-71. There were 6,700 seats in an open-air pavilion—much of it under cover—and room for another ...
A typical top-end speaker, driven by a typical 100watt power amplifier, cannot produce peak levels much above 105 dB SPL at 1 m (which translates roughly to 105 dB at the listening position from a pair of speakers in a typical listening room). Achieving truly realistic reproduction requires speakers capable of much higher levels than this ...
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 ...
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 ...
Dushanbe Flagpole: Dushanbe Tajikistan: 165 m (541 ft) [5] 24 May 2011 Free–standing 6 National Flag Square Flagpole 1 (2010-2017) Neftchiler Avenue, Bayil, Baku Azerbaijan: 162 m (531 ft) [6] 1 September 2010 Free–standing
A dipole speaker enclosure in its simplest form is constructed by mounting a loudspeaker driver on a flat panel. The panel may be folded to conserve space. The panel may be folded to conserve space. The term dipole derives from the fact that the polar response consists of two lobes , with equal radiation forwards and backwards, and none ...
Moving iron speaker Moving iron sounder. The moving iron speaker was the earliest type of electric loudspeaker. They are still used today in some miniature speakers where small size and low cost are more important than sound quality. A moving iron speaker consists of a ferrous-metal diaphragm or reed, a permanent magnet and a coil of insulated ...
Ordinary lamp cord has an inductance of 0.1–0.2 μH/ft, likewise for shielded cord, [6] so a run of up to about 10 feet (20 total feet of conductor) will have less than 1% inductive loss in the audible range (10 ft * 0.2 μH/ft = 2.0 μH, which is at or below the proximate threshold of 2 μH given above). Some premium speaker cables have ...
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