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VLF218 Cabinet Speakers

...move outside air over the motor structures of each driver. Additionally, cone movement drives air through the vented magnet pole-piece to cool the motor structures. BCL (Balanced Cone Loading) improves the linearity of the system by balancing the front and rear air loads. The 3rd harmonic distortion at 40V (50% power) averages less than 1.9% over its operating range. The enclosure has Strong
internal bracing reducing sound energy losses from enclosure vibration.

Community Professional Loudspeakers Cabinet Speakers

In the mid 1960s music was on the move. The growing "rock revolution," and the need to bring its explosion of new musical styles and messages to audiences around the world, demanded an evolution in the technology of touring sound: lightweight, mobile systems able to reproduce the depth and complexity of the music with absolute impact and clarity. Communication had become the critical factor in live sound. Bruce Howze, a creatively inclined loudspeaker designer working in Pennsylvania with influential bands such as Jefferson Airplane, was keenly aware that 2-way sound systems based on equipment from movie theaters were no longer viable. These had unacceptable limitations in coverage, clarity, and portability, largely due to their massive size, weight, and the lack of midrange output of their loudspeakers, a result of their limited 2-way design.

Frequency - The measurement of the number of times a repeated event, generally a waveform, occurs in a given time frame usually expressed in Hertz, abbreviated Hz, or cycles per second. . Used . . Used . ...

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...

Wings and Processors - Wings and processors are used to extend the capabilities of lighting control consoles. Wings usually add faders, bump buttons, displays, and other functions to the console while processors consolidate. Used . , alter, redirect or synchronize the signals coming to and from the console. Consoles often have wings designed specifically for use with that console, but processors are more generalized.. Used . ...

Smoke Machine - 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.

Hazers by contrast create a more diffusive, expansive haze that is usually not a thick and is used to enhance other ef. Used . fects, such as lighting and light beams.

Ellipsoidal - Ellipsoidal is the name for a type of theatrical light, getting the name from the ellipsoidal reflector used to intensify the light of a back-loading lamp through the barrel and lens. Ellipsoidals are. Used . used for their strong, well-defined light and their versatility.

Characteristics of an ellipsoidal lighting unit include:

* An adjustable barrel, allowing a lightin. Used . g designer to change the size and focus of the light thrown by the unit by changing the distance between the mirror and the lens or lenses
* A set of brackets on the end of the barrel for the insertion o...

Cabinet Speakers

Speaker cabinets are specially engineered units in which audio equipment such as speakers and their associated hardware are mounted into. These cabinets can be very basic affairs, little more than a wooden case with no additional features other than one port for inputting a sound cable, or they can be incredibly complex cabinets with features ranging from numerous ports and internal baffles to acoustic insulation and composite materials used in their construction. The main point of housing loud speakers and PA speakers in cabinets is not simply to make them look neat and tidy, although that is one benefit. The cabinet actually provides a useful function in preventing competing sound waves from interacting with each other and distorting the end product. This is because the diaphragm that the speaker driver uses to create the sound we hear generates sound waves both at the front and the rear, and these will be out of sync with each other, thus creating a distortion if not dealt with adequately. Other side effects include echo and reverberation, as the sound waves would reach the audience at slightly different times as they travel on different paths through the loud speakers towards them. In addition to minimizing these unwanted side effects, loud speaker’s cabinets also help to manage the vibrations which are caused by the driver frame, as well as the buildup of heat that is associated with amplifiers, driver voice coils and other moving components in PA speakers.