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4340 Monitors...tegration of the components that make up the four-way system so that each transducer reproduces only that portion of the audio spectrum for which it is specifically
designed. Deliberately restricting the Operating bandwidth of the individual drivers results in,maximization of each unit's transient response. Another benefit of bandwidth limitation is that each driver Operates only in the region of the audio spectrum through which it exhibits controlled sound distribution, thus
a dispersion pattern for the complete system is achieved which is ideal for studio use. The passive Frequency Dividing Network supplied with the 4341 controls the acoustic output of all the individual transducers. The 4340 is provided with a passive network for only the high and ultra-high frequency transitions, and is fitted with terminals for bi-amplification of the low frequency transition.
JBL MonitorsJames 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.
A hoist normally is used for lifting (near vertical) and a winch is normally used for pulling (near horizontal). . Used .
Incandescent light bulb - The incandescent light bulb (archaically known as the electric lamp) uses a glowing wire filament heated to white-hot by electrical resistance, to generate light (a process known as thermal radiation . Used . or incandescence). The bulb is the glass enclosure which keeps the filament in a vacuum or low-pressure noble gas, or a halogen gas in the case of quartz-halogen lamps (see below) in order to. Used . prevent oxidisation of the filament at high temperatures. In Australia and South Africa a light bulb is also called a light globe.
Because of its poor efficiency and yellowish color, it is being ...
Rigging Hardware - Rigging Hardware applies to all the pins, hooks and other pieces used to connect and hoist gear into place.. Used . . Used . ...
Chase - A set of cues that loops again and again. This is a lighting console term.. Used . . Used . ...
Amplitude - Amplitude is a nonnegative scalar measure of a wave's magnitude of oscillation, that is, magnitude of the maximum disturbance in the medium during one wave cycle.
Sometimes this distance . Used . is called the "peak amplitude", distinguishing it from another concept of amplitude, used especially in electrical engineering: the root mean square (RMS) amplitude, defined as the square roo. Used . t of the temporal mean of the square of the vertical distance of this graph from the horizontal axis. The use of peak amplitude is unambiguous for symmetric, periodic waves, like a sine wave, a square wave, or...