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2. Headphone amplifier - Wikipedia

   en.wikipedia.org/wiki/Headphone_amplifier

   A headphone amplifier is a low-powered audio amplifier designed particularly to drive headphones worn on or in the ears, instead of loudspeakers in speaker enclosures. Most commonly, headphone amplifiers are found embedded in electronic devices that have a headphone jack, such as integrated amplifiers , portable music players (e.g., iPods), and ...

3. Quadraphonic sound - Wikipedia

   en.wikipedia.org/wiki/Quadraphonic_sound

   Quadraphonic sound was a commercial failure when first introduced due to a variety of technical issues and format incompatibilities. Four channel audio formats can be more expensive to produce than standard two-channel stereo. Playback requires additional speakers and amplifier channels. It may also require specially designed decoding equipment.

4. CMoy - Wikipedia

   en.wikipedia.org/wiki/CMoy

   A CMoy is a pocket headphone amplifier originally designed by Pow Chu Moy. [1][2] The headphone amplifier is designed around single or dual-channel operational amplifiers (op-amps) such as Burr-Brown 's OPA2134 or OPA2132PA, however, a wide variety of op-amps have been successfully implemented. As the op-amp directly drives headphones, some ...

5. Grado Labs - Wikipedia

   en.wikipedia.org/wiki/Grado_Labs

   Grado Labs is an American audio manufacturer known for hand building high-end dynamic open-back headphones and cartridges in Brooklyn, New York. Grado Labs was founded in 1953, by master watchmaker Joseph Grado. The Brooklyn company is currently run by President and CEO John Grado, who bought the company in 1990 after running day-to-day ...

6. Bridged and paralleled amplifiers - Wikipedia

   en.wikipedia.org/wiki/Bridged_and_paralleled...

   A bridge-parallel amplifier topology is a hierarchical combination of the bridged and paralleled amplifier topologies, with at least four single-ended channels needed to produce one bridge-parallel channel. The two topologies complement each other in that the bridging allows for higher voltage output and the paralleling provides the current ...

7. Category:Audio amplifier manufacturers - Wikipedia

   en.wikipedia.org/wiki/Category:Audio_amplifier...

   Headphone amplifier manufacturers (7 P) J. JBL (5 P, 5 F) JVCKenwood (2 C, 8 P) M. Marshall amplifiers (7 P) Mesa/Boogie (3 P) ... Yamaha Pro Audio; YaqinAudio ...