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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.
Horn loudspeakers are very efficient, but have a sharp cutoff frequency, depending on the area of the horn mouth, with little sound output below. Bass sounds are usually produced by conventional speaker cones, since a circular horn mouth sufficient to reproduce 20 Hz would have a diameter of about 18 feet (5.5 m), except when a building, ground ...
The Paragon is a horn-loaded, stereo speaker system within a single 9-foot-wide (2.7 m) housing. [3] It is based on a diffusion principle developed by Richard Ranger as consultant to JBL. Launched in 1957, the Paragon is the world's earliest production stereo loudspeaker for home use, [5] and also the most expensive speaker at the time. [2]
The Leslie speaker is a combined amplifier and loudspeaker that projects the signal from an electric or electronic instrument and modifies the sound by rotating a baffle chamber ("drum") in front of the loudspeakers. A similar effect is provided by a rotating system of horns in front of the treble driver.
OMA is known in the audio world for their unique approach to sound and design. Due to the use of conical horns, their speakers are much larger than those using curved horns or typical enclosed loudspeakers. [7] The largest speaker OMA manufactures is called the Imperia, a four-way conical horn system measuring 7′ (2.1 m) tall. [8]
With the coming of stereo (two speakers) and surround sound (four or more), plain horns became even more impractical. Various speaker manufacturers have produced folded low-frequency horns which are much smaller (e.g., Altec Lansing, JBL, Klipsch, Lowther, Tannoy) and actually fit in practical rooms.