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2. Passive radiator (speaker) - Wikipedia

   en.wikipedia.org/wiki/Passive_radiator_(speaker)

   A speaker enclosure using a passive radiator usually contains an "active loudspeaker " (or main driver), and a passive radiator (also known as a "drone cone"). The active loudspeaker is a normal driver, and the passive radiator is of similar construction, but without a voice coil and magnet assembly. It is not attached to a voice coil or wired ...

3. Loudspeaker enclosure - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker_enclosure

   Below the bottom woofer is a bass reflex port. A loudspeaker enclosure or loudspeaker cabinet is an enclosure (often rectangular box-shaped) in which speaker drivers (e.g., loudspeakers and tweeters) and associated electronic hardware, such as crossover circuits and, in some cases, power amplifiers, are mounted.

4. Acoustic suspension - Wikipedia

   en.wikipedia.org/wiki/Acoustic_suspension

   Acoustic suspension is a loudspeaker cabinet design that uses one or more loudspeaker drivers mounted in a sealed box. Acoustic suspension systems reduce bass distortion which can be caused by stiff suspensions required on drivers used for open cabinet designs. A compact acoustic suspension loudspeaker was described in 1954 by Edgar Villchur ...

5. Transmission line loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Transmission_line_loudspeaker

   A transmission line loudspeaker is a loudspeaker enclosure design which uses the topology of an acoustic transmission line within the cabinet, compared to the simpler enclosures used by sealed (closed) or ported (bass reflex) designs. Instead of reverberating in a fairly simple damped enclosure, sound from the back of the bass speaker is ...

6. 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.

7. Retired Army Veteran ‘Couldn’t Sleep’ After He Won $150,000 ...

   www.aol.com/retired-army-veteran-couldn-t...

   A retired Army veteran was filled with so much excitement after learning that he had won the lottery he told officials that he stayed up all night.