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Sometimes the reproduction of the very lowest frequencies (20–~50 Hz) is augmented by a subwoofer often in its own (large) enclosure. In a two-way or three-way speaker system (one with drivers covering two or three different frequency ranges) there is a small amount of passive electronics called a crossover network which helps direct ...
The "main" system (also known as Front of House, commonly abbreviated FOH), which provides the amplified sound for the audience, typically uses a number of powerful amplifiers that drive a range of large, heavy-duty loudspeakers—including low-frequency speaker cabinets called subwoofers, full-range speaker cabinets, and high-range horns. A ...
A horn loudspeaker is a loudspeaker or loudspeaker element which uses an acoustic horn to increase the overall efficiency of the driving element(s). A common form (right) consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air.
A speaker driver mounted on a finite baffle will display a physical phenomenon known as interference, which can result in perceivable frequency-dependent sound attenuation. This phenomenon is particularly noticeable at low frequencies where the wavelengths are large enough that interference will affect the entire listening area.
The larger the speaker, and the higher the frequency, the longer the effective nearfield. The nearfield for this device is approximately 8 metres (26 ft). [9] An LRAD can thus emit a targeted "beam" of sound at very high volume, up to 160 dB at one meter from the device. This is louder than standing behind a jet engine taking off, or a nearby ...
The RCA model R7 Superette superheterodyne table radio. This is a list of notable radios, which encompasses specific models and brands of radio transmitters, receivers and transceivers, both actively manufactured and defunct, including receivers, two-way radios, citizens band radios, shortwave radios, ham radios, scanners, weather radios and airband and marine VHF radios.
Somewhere around 1969 the Celestion Ditton range of consumer stereo teak veneered floor speakers was unleashed on the British public. The range would go on to include smaller bookshelf models, but initially the lowest model was the very popular Ditton 15, to be renamed the 15XR (see the catalogue from 1978), and the top of the range was the formidable and always rare Ditton 66.
After class one afternoon in the spring of 1954, Villchur and Kloss rode from New York City to Woodstock in Villchur's 1938 Buick, to allow Kloss to hear the prototype. After this, they jointly decided to manufacture the new speaker design which became known as the "AR-1", the first commercial acoustic-suspension loudspeaker system.