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2. 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 ...

3. Audio power - Wikipedia

   en.wikipedia.org/wiki/Audio_power

   Active speakers comprise two or three speakers per channel, each fitted with its own amplifier, and preceded by an electronic crossover filter to separate the low-level audio signal into the frequency bands to be handled by each speaker. This approach enables complex active filters to be used on the low level signal, without the need to use ...

4. Audio crossover - Wikipedia

   en.wikipedia.org/wiki/Audio_crossover

   A passive crossover circuit is often mounted in a speaker enclosure to split up the amplified signal into a lower-frequency signal range and a higher-frequency signal range. A passive crossover splits up an audio signal after it is amplified by a single power amplifier, so that the amplified signal can be sent to two or more driver types, each ...

5. Loudspeaker - Wikipedia

   en.wikipedia.org/wiki/Loudspeaker

   A passive crossover A bi-amplified system with an active crossover. Used in multi-driver speaker systems, the crossover is an assembly of filters that separate the input signal into different frequency bands according to the requirements of each driver. Hence the drivers receive power only in the sound frequency range they were designed for ...

6. Bi-amping and tri-amping - Wikipedia

   en.wikipedia.org/wiki/Bi-amping_and_tri-amping

   Bi-amping - An active crossover with two amplifiers.. Bi-amping and tri-amping is the practice of using two or three audio amplifiers respectively to amplify different audio frequency ranges, with the amplified signals being routed to different speaker drivers, such as woofers, subwoofers and tweeters.

7. The best passive bookshelf speakers for most people - AOL

   www.aol.com/news/the-best-passive-bookshelf...

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8. Line level - Wikipedia

   en.wikipedia.org/wiki/Line_level

   A signal at +4 dBu is equivalent to a sine wave signal with a peak amplitude of approximately 1.736 volts, or any general signal at approximately 1.228 V RMS. Peak-to-peak (sometimes abbreviated as p-p ) amplitude (V PP ) refers to the total voltage swing of a signal, which is double the peak amplitude of the signal.

9. Active noise control - Wikipedia

   en.wikipedia.org/wiki/Active_noise_control

   Modern active noise control is generally achieved through the use of analog circuits or digital signal processing. Adaptive algorithms are designed to analyze the waveform of the background aural or nonaural noise, then based on the specific algorithm generate a signal that will either phase shift or invert the polarity of the original signal.