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VBS 415 Subwoofer

Community Professional Loudspeakers Subwoofer

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.

Reverb - Reverb is an audio effect that reproduces the many echos that occur when a sound is produced in an enclosed space where the sound is reflected repeatedly by the boundaries of the enclosure, even after. Used . the source of the sound stops. The number of echos and the duration of the echos can be varied and with some modern effects units, the shape of the enclosure can be altered as well.. Used . ...

Adaptor - A connector allowing more than 2 electrical devices to be connected to a single power source. These connections are normally in parallel (each device is given the same voltage levels), but current is . Used . divided between them. Also known as a "Twofer".

3-way splitters are known as "Threefers".. Used . ...

Color - Color temperature is measured in kelvins, and gel colors are organized by several different systems maintained by the color manufacturing companies. The apparent color of a light is determined largel. Used . y by the gel color given it, but also in part by the power level the lamp is being run at and the color of material is it to light. As the percentage of full power a lamp is being run at drop. Used . s, the tungsten filament in the bulb glows orange instead of more nearly white. This is known as amber drift or amber shift. Thus a 1000-watt instrument at 50% will appear far more orange than a 500-watt instr

Dimmers and Distro - Dimmers are devices used to vary the brightness of a light or stage light and are usually controlled remotely by a lighting console or controller by way of a protocol that is usually DMX. A Distro is . Used . a device that distributes power to many devices.. Used . ...

Lux - The lux (symbol: lx) is the SI derived unit of illuminance or illumination. It is equal to one lumen per square metre.

The difference between the lux and the lumen is that the lux takes i. Used . nto account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. The same . Used . 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.

Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent lig...

Subwoofer

Subwoofers are speakers that are designed to reproduce low-pitched or the bass frequencies typically ranging from about 20 to 200 Hz for consumer products, below 100 Hz for professional live sound, and below 80 Hz in THX-approved systems. These are complete loudspeakers intended to enhance the low frequency range of loudspeakers covering higher frequency bands. Subs, another term for subwoofers, are made up of one or more woofers in a loudspeaker enclosure capable of withstanding air pressure while resisting deformation. These subs require more power to operate because they are bigger (usually between 20.3 cm and 38.1 cm in diameter). Enclosures are available in a variety of designs that differ by efficiency, bandwidth, size and cost. Designs include bass reflex with a port or passive radiator in the enclosure, infinite baffle, horn-loaded, and band pass designs. A multimedia home theater system in low-cost compact plastic cabinet that is said to be a subwoofer is more appropriately called a bass driver because it is too small to produce deep bass. Subwoofers are also powered by amplifiers. Active or powered subwoofers are driven by a built-in amplifier. Passive subwoofers have an external amplifier, subwoofer drivers and enclosures. Subwoofers are popular because of they can pack a large, low frequency punch in a small space, providing a powerful audio experience like being in a movie theater or a concert venue. They are installed in cars or at home as part of a home theater system which is a more common application. In both cases, the subwoofer or low frequency speaker is not considered a stand alone device but helps to reinforce the higher pitched sound produced from the speakers.