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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 .

3. Sound Blaster X7 - Wikipedia

   en.wikipedia.org/wiki/Sound_Blaster_X7

   There is a switch behind the Sound Blaster X7 to switch modes between driving a pair of 4-ohms or 8-ohms passive speakers. [3] With its bundled 24V, 2.91A power adapter, it can deliver up to 27 watts per channel to 8-ohms passive speakers and up to 38 watts per channel to 4-ohms passive speakers. [4]

4. wOOx Technology - Wikipedia

   en.wikipedia.org/wiki/WOOx_Technology

   wOOx Technology (rendered wOOx) is a brand created by Philips to identify loudspeaker systems that employ passive radiator technology along with active equalisation to maximize the output of the passive diaphragm. wOOx Technology optimizes the active bass driver, the passive bass radiator, and the active equalisation curve to obtain maximum low-frequency reproduction in a relatively compact ...

5. Sound Blaster Roar - Wikipedia

   en.wikipedia.org/wiki/Sound_Blaster_Roar

   The Sound Blaster Roar 2 contains the same speaker drivers as the Sound Blaster Roar but is 20 percent smaller and 10 percent lighter than the Sound Blaster Roar. The left and right tweeters have been moved to the top of the speaker. The passive radiators are not covered by metal grills and can be seen pulsating.

6. PC speaker - Wikipedia

   en.wikipedia.org/wiki/PC_speaker

   A PC speaker is a loudspeaker built into some IBM PC compatible computers. The first IBM Personal Computer , model 5150 , employed a standard 2.25 inch magnetic driven (dynamic) speaker. [ 1 ] More recent computers use a tiny moving-iron or piezo speaker instead. [ 2 ]

7. Powered speakers - Wikipedia

   en.wikipedia.org/wiki/Powered_speakers

   An active full-range loudspeaker. Powered speakers, also known as self-powered speakers and active speakers, are loudspeakers that have built-in amplifiers.Powered speakers are used in a range of settings, including in sound reinforcement systems (used at live music concerts), both for the main speakers facing the audience and the monitor speakers facing the performers; by DJs performing at ...