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Used SRX715 For Sale
SRX715 Cabinet Speakers...g aluminum horn.
Bi-amp or full-range passive
Operation may be selected by means
of a recessed, high-current switch
mounted on the input plate.
For use on a tripod or over a
Subwoofer, JBL's dual-angle pole
mount is included. This feature allows
the speaker to be mounted in a
vertical position or with a 10deg down tilt
for optimum audience coverage. For
applications requiring suspension, a
flying version, the SRX715F is
available. The F version offers the
option of selecting economical, forged
eyebolts (not included) for fixed
installation or the convenience of
detachable track fittings (not included)
for portable applications.
JBL Cabinet SpeakersJames 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.
Preset Boards - Preset boards are the most basic lighting consoles - and also the most prevalent in smaller installations. They consist of two identical fader banks, called 'scenes.' The faders (control slides) on th. Used . ese scenes can be manually adjusted. Each scene has the same number of channels which control the same dimmers, but only one is live at a time, so the console operator can build a scene, then. Used . fade to it. These scenes are often referred to as A-scenes and B-scenes, and a cross-fader is used to fade between the A and B scene.
Generally, a preset board operator has a cue sheet for each s...
Power Distro - A power distro send power evenly and appropriately to various staging and rigging equipment to insure there is enough power to properly run the various equipment.. Used . . Used . ...
Intelligent Fixtures - Intelligent Fixtures or Moving Lights were originally implemented in 1972, but the first computer-controlled stage lighting fixtures began to gain widespread acceptance in the concert industry in the . Used . early 1980's. As the digital age progressed, the cost of these fixtures was reduced and they slowly started being used in more 'traditional' theatrical environments. Intelligent fixtures are . Used . currently used in almost all major theatrical productions.
Usually relying on compact arc lamps as a light source, these fixtures generally use stepper motors connected to varying internal devices...
Digital signal - A digital signal is a signal that is both discrete and quantized. Its primary counterpart is an analog signal. Digital signals usually occur in electronics, but may be found in other fields of enginee. Used . ring as well.
Digital signals may be divided into two categories:
* Some are inherently both discrete and quantized (ex. the number of people who visit a certain. Used . establishment every day).
* Some describe phenomena that are actually continuous in one way or another. The signal must be discretized, quantized, or both, in order to make it digital. This "digitiz...