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Acoustic suspension or air suspension is a variation of the closed-box enclosure, using a box size that exploits the almost linear air spring resulting in a −3 dB low-frequency cut-off point of 30–40 Hz from a box of only one to two cubic feet or so. [16]
From about 1900 to the 1950s, the "lowest frequency in practical use" in recordings, broadcasting and music playback was 100 Hz. [9] When sound was developed for motion pictures, the basic RCA sound system was a single 8-inch (20 cm) speaker mounted in straight horn, an approach which was deemed unsatisfactory by Hollywood decisionmakers, who hired Western Electric engineers to develop a ...
The result is that the coupled driver pair (iso-group) can now produce the same frequency response in half the box volume that a single driver of the same type would require. For example, if a speaker is optimized for performance in a 40 liter enclosure, one iso-group of the same speakers can achieve the same low frequency extension and overall ...
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.
If the template has a separate documentation page (usually called "Template:template name/doc"), add [[Category:National Football League owner navigational boxes]] to the <includeonly> section at the bottom of that page.
The Dybbuk box, or Dibbuk box (Hebrew: קופסת דיבוק, romanized: Kufsat Dibbuk), is an antique wine-cabinet claimed to be haunted by a dybbuk, a concept from Judaism [citation needed]. The box gained notoriety when it was auctioned off on eBay by owner Kevin Mannis, who created a story featuring Jewish Holocaust survivors and paranormal ...
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