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2. Polk Audio - Wikipedia

   en.wikipedia.org/wiki/Polk_Audio

   Polk Audio was founded by Matthew Polk, George Klopfer and Sandy Gross in 1972. The three first met one another while attending classes at Johns Hopkins University in Baltimore . After graduating in 1971, the team collaborated on producing a sound system for a local bluegrass music convention.

3. List of loudspeaker manufacturers - Wikipedia

   en.wikipedia.org/wiki/List_of_loudspeaker...

   Oswalds Mill Audio: United States Panasonic: Japan Peavey Electronics: United States Philips: Netherlands Pioneer: Japan PMC speakers: United Kingdom Polk Audio: United States ProAc: United Kingdom PSB Speakers: Canada QSC Audio Products: United States Quad Electroacoustics: United Kingdom (brand) Radio Shack: United States RCF audio: Italy ...

4. Category:Audio amplifier specifications - Wikipedia

   en.wikipedia.org/wiki/Category:Audio_amplifier...

   Download as PDF; Printable version; In other projects ... move to sidebar hide. Help. Parameters often seen in the specifications of (especially audio) electronic ...

5. DEI Holdings - Wikipedia

   en.wikipedia.org/wiki/DEI_Holdings

   In 2004, the firm bought speaker company Definitive Technology; [3] in 2006, it bought Polk Audio. [4] In 2008, the companies adapted a holding company strategy, and their parent became DEI Holdings, Inc. [5] In 2011, the company was bought by private equity firm Charlesbank Capital Partners. [6]

6. Electrostatic loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Electrostatic_loudspeaker

   The grids are driven by the audio signal; front and rear grid are driven in antiphase. As a result, a uniform electrostatic field proportional to the audio signal is produced between both grids. This causes a force to be exerted on the charged diaphragm, and its resulting movement drives the air on either side of it.

7. Definitive Technology - Wikipedia

   en.wikipedia.org/wiki/Definitive_Technology

   In April 2013, the company combined Polk, Definitive Technology and the Boom Movement brands into a new division called Sound United. [ 7 ] In April 2015, the company released its W7 speaker with support for the Play-Fi wireless protocol for multi-room audio, produced by audio company DTS, Inc. , now owned by holding company Xperi . [ 1 ]

8. Electrical characteristics of dynamic loudspeakers - Wikipedia

   en.wikipedia.org/wiki/Electrical_characteristics...

   Diagram showing the variation in impedance of a typical mid-range loudspeaker. Nominal impedance is usually determined at the lowest point after resonance. However, it is possible for the low-frequency impedance to be still lower than this. [1]

9. Acoustic Research - Wikipedia

   en.wikipedia.org/wiki/Acoustic_Research

   Acoustic Research was a Cambridge, Massachusetts-based company that manufactured high-end audio equipment. The brand is now owned by VOXX.Acoustic Research was known for the AR-3 series of speaker systems, which used the 12 in (300 mm) acoustic suspension woofer of the AR-1 with newly designed dome mid-range speaker and high-frequency drivers.