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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.
Download QR code; In other projects Appearance. move to sidebar hide ... English: Specifications for Celestion speakers 1978. Date: 23 August 1978: Source: Own work ...
Celestion: United Kingdom Cerwin-Vega: United States Clair Brothers: United States Clair Global: United States Clarion: Japan Community Professional Loudspeakers: United States Creative: Singapore d&b Audiotechnik: Germany DALI: Denmark Definitive Technology: United States Denon: Japan DEQX: Australia Devialet: France Duntech: Australia ...
If you've been shopping in a big box retail store you've probably heard an announcement on the loudspeaker such as, "code yellow toys, code yellow toys." This "code" is one of many innocuous ...
This frequency is known as the free-space resonance of the loudspeaker and is designated by F s. At this frequency, the voice coil is vibrating in the speaker's magnetic field with maximum peak-to-peak amplitude and velocity. The back EMF generated by this movement is also at its maximum. The electrical impedance of the speaker varies with the ...
Speakers with cone tweeters offered the best stereo imaging when positioned in the room's corners, a common practice in the 1950s, 1960s and early 1970s. During the 1970s and 1980s, the widespread introduction of higher quality audiophile discs and the advent of the CD caused the cone tweeter to fall out of popularity because cone tweeters ...
The 1925 paper [1] of Chester W. Rice and Edward W. Kellogg, fueled by advances in radio and electronics, increased interest in direct radiator loudspeakers. In 1930, A. J. Thuras of Bell Labs patented (US Patent No. 1869178) his "Sound Translating Device" (essentially a vented box) which was evidence of the interest in many types of enclosure design at the time.
Some speaker driver designs have provisions to do so (typically termed servomechanisms); these are generally used only in woofers and especially subwoofers, due to the greatly increased cone excursions required at those frequencies in a driver whose cone size is well under the wavelength of some of the sounds it is made to reproduce (ie, bass ...