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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 ...
Distributed Mode Loudspeaker (DML) is a flat-panel loudspeaker technology, developed by NXT, [1] in which sound is produced by inducing uniformly distributed vibration modes in the panel through a special electro-acoustic exciter.
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 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).
A rotary woofer is a subwoofer-style loudspeaker which reproduces very low frequency content by using a conventional speaker voice coil's motion to change the pitch (angle) of the blades of an impeller rotating at a constant speed. The pitch of the fan blades is controlled by the audio signal presented to the voice coil, and is able to swing ...
In 1992, W1 series subwoofer drivers were introduced. These speakers introduced the concept of a small box/long excursion woofer designs for car audio. The CS-1 series was also introduced, JL Audio's first component speaker introduction. In 1993, the W6-series subwoofer drivers are introduced in 8, 10, 12 and 15-inch sizes. This product was ...
The 600 replaced the Mercedes-Benz W189 300d limousine, the final version of the W186 and W189 model 300-series company flagship produced between the early 1950s and early 1960s. It received the nickname Adenauer after Konrad Adenauer , the first Chancellor of West Germany , who employed several of these automobiles during his tenure in office.
Nisi Dominus, RV 608, is a musical setting by Antonio Vivaldi of Psalm 127 (Vulgate 126), intended for Vespers.His score, written c. 1715, calls for alto voice, strings and organ or harpsichord. [1]