Buy Used 4888 ADP by JBL

Contact a Sales Specialist about used 4888 ADP for sale.

4888 ADP Line Array Speakers

...provide exceptionally rigid, lightweight enclosure construction.

* Rugged DuraFlex™ exterior finish; weatherized components.

* Patented, integrated S.A.F.E.™ suspension system: premium heat-treated alloys provide high-strength, reliable hanging arrays.

* Pre-engineered to accept optional JBL DrivePack amplified electronics package. Rear-panel mechanical attachments and electrical connections ensure upgrade path to self-powered system.

* For use in stand-alone arrays or in combination with other VERTEC system models.

JBL Line Array Speakers

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.

Control Consoles - Lighting consoles are electronic devices used in lighting design to control multiple lighting and staging devices. They can generally control dimmers and many modern consoles can also control automate. Used . d lighting, fog machines, hazers, and other special effects devices. Lighting consoles communicate with the devices in the lighting system with an electronic control protocol, the most common. Used . of which is DMX-512.
...

1000 - 5000 Lumens - A projector that produces 1000 - 5000 lumens of light.. Used . . Used . ...

Zoom Flash - A flash with the capability of adjusting the width of its beam to accurately fit the angle of the lens being used.. Used . . Used . ...

Large Format Mixers - Large format mixers are audio mixers having more than 24 channels for input/output.. Used . . Used . ...

Limelight - An early type of stage light in which an intense illumination is created when an oxyhydrogen flame is directed at a cylinder of lime, also called calcium oxide, which can be raised to white incandesce. Used . nce heat without melting to producing brilliant illumination. The limelight effect was discovered early in the nineteenth century by Goldsworthy Gurney. A Scottish engineer, Thomas Drummond. Used . , realized that the light would be useful for surveying and built a working version in 1826. Therefore, the light is sometimes known as the Drummond Light. The Limelights first theatrical use was in 1837 at ...

Line Array Speakers

Line array speakers make up a loudspeaker system to create a sound source that produces an evenly distributed sound output. The driver of each line array element is close enough to the driver of the next element to create constructive interference. The resulting sound waves go farther than sound waves from traditional loudspeakers. Line array systems date back to the early days of research in acoustics. Many old town halls and public venues still have old line source boxes which were found to project voice well though they are much smaller than horn-loaded speakers. These days, line array speakers use different drivers for high-, mid- and low-frequency passbands that must be in line. Each enclosure must be set up closely to form columns composed of these drivers. To increase the frequency range and maximum sound pressure, the number of drivers per enclosure must be increased. The orientation of line array speakers may vary. Vertical arrays are excellent for focusing sound at audiences without wasting output energy on ceilings or empty air above the audience because of its very narrow vertical output with a normally-wide horizontal pattern. On the other hand, horizontal line arrays have a very narrow horizontal output with a tall vertical pattern. For hanging concert speakers which are usually part of a concert reinforcement system, enclosures are set up together using a specialized rigging hardware and they hang from a single point. These line array speakers are curved backward at the lower portion so that the sound will reach more audience.