Buy Used 425-8A by Altec Lansing

425-8A

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.
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...

Subtractive Color - Subtractive color explains the theory of mixing paints, dyes, inks, and natural colorants to create colors which absorb some wavelengths of light and reflect others. The color that an object appears t. Used . o have is based on what parts of the electromagnetic spectrum are reflected by it, or conversely by what parts of the spectrum are not absorbed.

Anything that is not additive col. Used . or is subtractive color. No other color mixing systems are known, except the imperfect system resulting from mixing real pigments, something that is very confusing nowadays.

Color is not an absolu...

Hazer - A Smoke Machine or Fogger is an electrical device that creates clouds of artificual and hopefully non-toxic fog. The fog may come in different colors or smells and may be water or mineral based. It i. Used . s used for effects in theatre, staging, concerts and clubs.

A Hazer by contrast create a more diffusive, expansive haze that is usually not a thick and is used to enhance other e. Used . ffects, such as lighting and light beams.

Motor - A hoist is a device used for lifting or lowering a load by means of a drum or barrel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use ch. Used . ain, fiber or wire rope as its lifting medium.

A hoist normally is used for lifting (near vertical) and a winch is normally used for pulling (near horizontal). . 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 ...

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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Like new and comes in original box.

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