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2. Speaker wire - Wikipedia

   en.wikipedia.org/wiki/Speaker_wire

   Some early speaker cable designs featured another pair of wires for rectified direct current to supply electrical power for an electromagnet in the loudspeaker. [2] Essentially all speakers manufactured now use permanent magnets, a practice which displaced field electromagnet speakers in the 1940s and 1950s.

3. RCA connector - Wikipedia

   en.wikipedia.org/wiki/RCA_connector

   Varying cable quality means that a cheap line-level audio cable might not successfully transfer component video. For digital audio, as long as a connection is successfully made using the cables the sound will remain faithful to the original signal because a digital signal can only be fully received or not received at all. Cables should meet the ...

4. Audio and video interfaces and connectors - Wikipedia

   en.wikipedia.org/wiki/Audio_and_video_interfaces...

   Several generic digital data connection standards are designed to carry audio/video data along with other data and power: USB was designed as a single connector to support all needs, including any generic data, audio/video, power, and more; DisplayLink is its most successful Audio+Video protocol. Until the 3.0 revision, very low data rates ...

5. 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 ...

6. The best soundbars for your TV in 2025: No more ... - AOL

   www.aol.com/lifestyle/best-soundbars-for-tv...

   A 7.1.2-channel system has seven main speakers, one subwoofer and two rear speakers. As a general rule, more speakers equals bigger, broader sound. Size: Does size matter? As with most speakers ...

7. Constant-voltage speaker system - Wikipedia

   en.wikipedia.org/wiki/Constant-voltage_speaker...

   Constant-voltage speaker systems are also commonly referred to as 25-, 70-, 70.7-, 100 or 210-volt speaker systems; distributed speaker systems; or high-impedance speaker systems. In Canada and the US, they are most commonly referred to as 70-volt speakers. In Europe, the 100 V system is the most widespread, with amplifier and speaker products ...