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Buy Used MR925 by JBL

MR925

JBL
As a stage speaker or a pole mountedspeaker, the MR925 is a truly great general purpose sound reinforcement system for speech or vocals, full-range music playback, or reproduction of amplified musical instruments. It's built with a 15" low frequency transducer and a pure Titanium Compression Driver on a 100deg x 80deg Flat-Front Bi-Radial horn.The LF driver produces Strong bass output while the Compression Driver/horn smoothly disperses mid-and high-frequencies over an optimum field.
Also Known As: Used MR925
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MR925 Drivers and Horns

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JBL

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.
Delay - Delay is an audio effect which records a signal or sound and then plays it back after a period of time. The delayed signal may be played back multiple times or looped back into the recording again to . Used . create the sound of a repeating decaying echo. Unlike reverb, which uses reflected sound to produce many echos, delay has greater control over the number of times the sound is echoed. . 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 ...

Converters and Sync - An audio converter is a type of electronic hardware that converts analog audio signals to digital audio format or vice versa. Audio synchronizers arrange the signals, either analog, digital or both, s. Used . o that multiple the signals occur in time. . Used . ...

MS - A stereo recording technique that uses of two different types of microphones, a directional or cardioid for the M facing forward and an omni-directional or figure-eight for the S with the lobes at a 9. Used . 0 degree angle. The main advantage being that the center sounds are not 45 degrees off-axis eliminating the gap in XY recording. Initially there were problems with reflections due to the use. Used . of two different types of mics, however mics have now been developed to overcome this problem....

Memory Consoles - Memory-based consoles have become very popular in almost all larger installations, particularly theatres. These new types of controls have completely replaced preset consoles as controllers of choice. Used . . Memory consoles are preferable in productions where scenes do not change from show to show, such as a theatre production, because scenes are designed and digitally recorded, so there is les. Used . s room for human error, and less manpower is required to produce the same result.

Memory consoles have a bank of faders called 'submasters.' These submasters can be programmed to control a single

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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