The Professional Monitor Company Limited, better known as PMC, is a British

loudspeaker A loudspeaker (commonly referred to as a speaker or speaker driver) is an electroacoustic transducer that converts an electrical audio signal into a corresponding sound. A ''speaker system'', also often simply referred to as a "speaker" or " ...

manufacturer, established in 1991. The company's products are widely used within domestic settings, professional studios and other hi-fi applications. The company is one of a handful to have won an

Emmy The Emmy Awards, or Emmys, are an extensive range of awards for artistic and technical merit for the American and international television industry. A number of annual Emmy Award ceremonies are held throughout the calendar year, each with the ...

award in recognition of its "contribution to recording excellence".

History

PMC was formed by Peter Thomas (previously of the

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) and Adrian Loader (previously of FWO Bauch, an audio distributor) in 1990. They produced their first loudspeaker, the BB5-A, which was a large studio monitor. The first production versions were sold to the BBC and

Metropolis Studios Metropolis Studios is a music production and entertainment industry company established in 1989 by Gary Langan, Carey Taylor and Karin Clayton.Donald Brackett It is located in the Powerhouse, a Grade II listed building, at 70 Chiswick High Roa ...

. The BBC still use the BB5 at the

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studios, and use other PMC speakers in other locations as well. Metropolis now has around fifteen of them installed at its recording and mastering facility in

West London West London is the western part of London, England, north of the River Thames, west of the City of London, and extending to the Greater London boundary. The term is used to differentiate the area from the other parts of London: North London ...

. Notable users of the BB5 include

Prince A prince is a male ruler (ranked below a king, grand prince, and grand duke) or a male member of a monarch's or former monarch's family. ''Prince'' is also a title of nobility (often highest), often hereditary, in some European states. Th ...

and

Stevie Wonder Stevland Hardaway Morris ( Judkins; May 13, 1950), known professionally as Stevie Wonder, is an American singer-songwriter, who is credited as a pioneer and influence by musicians across a range of genres that include rhythm and blues, Pop musi ...

's Wonderland Studio. PMC was awarded an

Emmy Award The Emmy Awards, or Emmys, are an extensive range of awards for artistic and technical merit for the American and international television industry. A number of annual Emmy Award ceremonies are held throughout the calendar year, each with the ...

for their recording work.

Technology

PMC uses "Advanced

Transmission Line In electrical engineering, a transmission line is a specialized cable or other structure designed to conduct electromagnetic waves in a contained manner. The term applies when the conductors are long enough that the wave nature of the transmis ...

" technology in all of their loudspeakers. This is a means of loading a drive unit in a

cabinet Cabinet or The Cabinet may refer to: Furniture * Cabinetry, a box-shaped piece of furniture with doors and/or drawers * Display cabinet, a piece of furniture with one or more transparent glass sheets or transparent polycarbonate sheets * Filing ...

in such a way as to absorb the unwanted

frequencies Frequency is the number of occurrences of a repeating event per unit of time. It is also occasionally referred to as ''temporal frequency'' for clarity, and is distinct from ''angular frequency''. Frequency is measured in hertz (Hz) which is eq ...

that radiate from the rear of the speaker driver. The speaker is mounted at the end of a folded line within the cabinet, which is lined with foam of varying absorbency. The lowest frequencies are allowed to pass through the line and emerge in phase from a vent on the front or rear face of the cabinet, in effect acting as a second bass driver. By absorbing the unwanted bass frequencies, the upper bass and midrange are not masked by harmonic distortion. The ATL design enables the speakers to produce higher

sound pressure Sound pressure or acoustic pressure is the local pressure deviation from the ambient (average or equilibrium) atmospheric pressure, caused by a sound wave. In air, sound pressure can be measured using a microphone, and in water with a hydrophone ...

levels and deeper bass extension than is possible with similar sized speakers using either ported or

sealed Seal may refer to any of the following: Common uses * Pinniped, a diverse group of semi-aquatic marine mammals, many of which are commonly called seals, particularly: ** Earless seal, or "true seal" ** Fur seal * Seal (emblem), a device to impr ...

cabinets. The speakers can also be played at lower volumes without any loss of frequency response.

Products

PMC manufactures products for both hi-fi and studio use. The hi-fi products originally grew out of the studio designs. The company also makes a range of on-wall speakers called the Wafer series. These also use the folded transmission line and are voiced identically to the traditional box speakers.

References

External links

* {{DEFAULTSORT:Pmc Speakers Audio equipment manufacturers of the United Kingdom Loudspeaker manufacturers