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Buy Used 425-8A by Altec Lansing


Altec Lansing
Also Known As: Used 425-8A

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425-8A Mount Speakers

Altec Lansing

Altec Lansing Mount Speakers

Established in 1937, today Altec Lansing Professional is a leading manufacturer of high performance, high quality professional audio systems and components. Altec Lansing traces its history to the group of Western Electric® engineers who developed the first commercial professional sound system for the movie "The Jazz Singer" starring Al Jolson. This "talkie" revolutionized motion picture sound, and marked the starting point of the twentieth century audio revolution. Altec Lansing celebrates the company's rich heritage in the professional audio industry. Our history of technological innovation is unmatched.
Cue - Generally, a lighting board operator has a cue sheet for each scene, which is a diagram of the board with the faders in their positions as determined by the lighting designer. The operator sets the fa. Used . ders into their positions based on the cue sheets. Typically during a cue, the operator sets the next scene. Then, the operator makes the transition between the scenes using the cross-fader.. 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...

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 . ...

Full Racks - Dimmer racks are cabinets designed for stacking many dimmer modules into an easily accessible space. They can be permanent architectural installments or portable units built for road travel and vary i. Used . n size from small rack with only a few dimmer modules to very large racks with hundreds. . Used . ...

Moving Lights - Moving lights or intelligent fixtures 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...

Mount Speakers

Mount speakers are loudspeakers which are mounted on walls, and are commonly used in theaters and other venues where â??elevatedâ?? speakers are needed at key strategic points in the venue to produce an overall surround sound affect. The most common kinds of mount speakers are dynamic loudspeakers. A typical dynamic wall mounted speaker consists of a lightweight cone (diaphragm), which is hooked up to a frame through a coil of tinsel wire constrained in a flexible suspension. Mount speakers work in exactly the same way as regular loudspeakers, in that the electric current in the voice coil creates a magnetic field. This interacts with the magnetic system of the driver and generates a force that makes the coil and attached speaker cone vibrate (move back and forth), which reproduces sound. There are many types of wall mounted speaker available. Full range drivers are one of the most common types of ceiling mounted speaker, as they have the widest possible frequency response. Other mount speakers include subwoofers, which are designed to accurately reproduce the lowest bass notes, and woofers, which reproduce low frequency sounds. Tweeters on the other hand are high frequency mount speakers, designed for replicating the highest frequency sounds. Mid range mount speakers are designed for the middle on the audio spectrum, and therefore are good for neither high nor low frequency sound replication.

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