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Buy Used 3677 by JBL


The JBL 3677 cinema loudspeakersystem provides natural sound qualityfor music and dialog in small cinemaapplications. The convenient allin-one enclosure requires no fieldassembly, simplifies set-up, andreduces labor costs. Enclosure designis extremely shallow in depth (292mm; 11.5 inches), to Minimize thespace required behind the screen.The high-frequency section consistsof the JBL 2416-1 pure Titanium compressiondriver and 2373 Flat-FrontBi-Radial horn. The Titaniumdiaphragm of th...
Also Known As: Used 3677
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3677 Drivers and Horns

diaphragm of the 2416-1 ensures natural
sound and reliability, mandatory
in today's motion picture theatres.
The 2373 horn provides smooth,
even coverage throughout the
The low frequency driver is the
JBL 2035H, which provides an
exceptional match for system power
handling and frequency response in
the crossover region.

JBL Drivers and Horns

James Bullough Lansing was born James Martini, 14 January 1902, in Macoupin County, Millwood Township, Illinois. His parents were Henry Martini, born in St. Louis, Missouri, and Grace Erbs Martini, born in Central City, Illinois. The elder Martini was a coal mining engineer, and his work required that the family moved about quite a bit during Lansing's early years. Lansing was the ninth of fourteen children, one of whom died in infancy. For a short time, Lansing lived with the Bullough family in Litchfield, Illinois. He later took their name when he changed his from Martini to Lansing. Not much is known about Lansing's early days, and we are indebted to Bill Martin, one of three surviving brothers, for providing most of the information presented here. Lansing graduated the eighth grade at the Lawrence School in Springfield, Illinois. He also attended the Springfield, Illinois, High School. Later, he took courses in a small business college in Springfield. As a young lad he was very interested in all things electrical and mechanical. At about the age of 10, he built a Leyden Jar which he used to play pranks on his playmates. He also constructed crystal sets, and at one time, probably about the age of 12 or so, built a small radio transmitter from scratch. The signals from this set were apparently strong enough to reach the Great Lakes Naval Station in Illinois; naval personnel determined the source of these signals and later supervised the timely dismantling of the young Lansing's radio transmitter. For a while Lansing worked as an automotive mechanic, specializing in fine engine repair work. He attended an automotive school for mechanics in Detroit through the courtesy of the dealer he worked for in Springfield. Lansing's mother died 1 November 1924 at the age of 56, and at that time Lansing left home. As best we can determine, he went directly to Salt Lake City. Mrs. Lansing, the former Glenna Peterson of Salt Lake City, tells of meeting Lansing in 1925 in that city. At the time he was working for a radio station as an engineer. In addition, he worked for the Baldwin loudspeaker company in Salt Lake City for a time. He also met his future business partner, Ken Decker, in Salt Lake City.
Yoke - The metal strip running over the top and on both sides of a light to which the G-Clamp is attached. . Used . . Used . ...

Box - A box truss is square in shape like a box in cross section and is useful for touring as gear can be hung inside the truss which protects it when loading and takes up less space in the truck.. Used . . Used . ...

Tungsten - Tungsten (formerly wolfram) is a chemical element in the periodic table that has the symbol W (L. wolframium) and atomic number 74. A very hard, heavy, steel-gray to white transition metal, tungsten i. Used . s found in several ores including wolframite and scheelite and is remarkable for its robust physical properties. The pure form is used mainly in electrical applications but its many compounds. Used . and alloys are widely used in many applications (most notably in light bulb filaments and in space-age superalloys).

Pure tungsten is steel-gray to tin-white and is a hard metal. Tungsten can be ...

Lighting instruments - There are a variety of instruments frequently used in the theater. Although they vary in many ways they all have the following four basic components in one form or another...

* Box/Housin. Used . g - a metal or plastic container to house the whole instrument and prevent light from spilling in un-wanted directions.
* Source of light (bulb or lamp).
* Lens or opening - the g. Used . ap in the housing where the light is intended to come out.
* Reflector - behind or around the light source in such a way as to direct more light towards the lense or opening.

Additional feat...

AB - A stereo recording technique. Two microphones of the same make and model are located next to one another in , and point in the same direction. The left mic is panned hard left on the mixer. The right. Used . mic is panned hard right.

This technique has flaws, such as audio reflections from each mic which can cause comb filtering (narrow coverage). This can be somewhat corrected by s. Used . pacing the mics out, but this will not fully correct the problem and can lead to muddy sound from delay artifacts.

Drivers and Horns

Drivers and horns refer to loudspeakers that employ a horn to boost the speaker driver element‚??s efficiency. The ‚??speaker horn‚?? is basically a kind of electromagnetically driven diaphragm. The horn used in drivers and horns doesn‚??t actually do anything to enhance or amplify sound coming from the cabinet driver itself ‚?? it is passive. All it does is to give the coupling efficiency between the air and the speaker driver a boost. Drivers and horns essentially serve to match the impedance between the low density of outside air and the high density of the speaker horn diaphragm. Drivers and horns are perhaps best put to use in concerts and PA systems, where sound reinforcement is needed. This can be provided by the high sound pressure that drivers and horns produce, although the sound‚??s fidelity may be compromised when they are employed. Cabinet horn loudspeakers are also popular in concert venues, as they are able to reproduce high volume bass sounds. In concert venues, drivers and horns are commonly called a bass driver, or a tweeter, and are employed so that the bass is not just heard but also ‚??felt‚?? by the audience. Multiple drivers and horns cab be combined into an array to boost the sound pressure even further, and this is more preferable than using a single horn that has a larger ‚??mouth‚?? area, as an array such as this affords greater output power. Drivers and horns have other, more specialized uses. They can be used to extend a speaker driver‚??s low frequency limit, and they are able to modify a sound wave‚??s directional characteristics at both the horizontal coverage angle and the vertical coverage angle, depending on the width and height of the horn.
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