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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 ElectricĀ® 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.
Ethernet - Ethernet (this name comes from the physical concept of ether) is a frame-based computer networking technology for local area networks (LANs). It defines wiring and signaling for the physical layer, an. Used . d frame formats and protocols for the media access control (MAC)/data link layer of the OSI model. Ethernet is mostly standardized as IEEEs 802.3. It has become the most widespread LAN techno. Used . logy in use during the 1990s to the present, and has largely replaced all other LAN standards such as token ring, FDDI, and ARCNET. ...

Stepper Motor - A stepper motor is a type of electric motor that is used when something has to be positioned very precisely or rotated by an exact angle.

In a stepper motor, an internal rotor containing. Used . permanent magnets is controlled by a set of stationary electromagnets that are switched electronically. Hence, it is a cross between a DC electric motor and a solenoid. Stepper motors do not. Used . use brushes and commutators.

Stepper motors have a fixed number of magnetic poles that determine the number of steps per revolution. Most common stepper motors have 200 full steps/revolution, mea

Moving Light - A moving light truss has a wider opening to accommodate the space required for a moving head light. . Used . . Used . ...

Kelvin - The kelvin (symbol: K) is the SI unit of temperature, and is one of the seven SI base units. It is defined by two facts: zero kelvins is absolute zero (when molecular motion stops), and one kelvin is . Used . the fraction 1/273.16 of the thermodynamic temperature of the triple point of water. The Celsius temperature scale is now defined in terms of the kelvin, with 0 °C corresponding to 273.15 kel. Used . vins, approximately the freezing point of water under ordinary conditions.

The kelvin is named after the British physicist and engineer William Thomson, 1st Baron Kelvin; his barony was in turn na...

Lighting - Lighting or stage lighting is a tool and art form in the production of theater, dance, opera and other performance arts. Several different types of stage lighting instruments are used in the pursuit o. Used . f the various principles or goals of lighting ranging from simple illumination to mood setting. Lighting also applies architectural accents to add color or shading to indoor and outdoor sett. Used . ings....

Mount Speakers

Mount speakers are loudspeakers which are mounted on walls, and are commonly used in theaters and other venues where ā??elevatedā?? 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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