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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. Output transformerless - Wikipedia

   en.wikipedia.org/wiki/Output_transformerless

   Output transformerless ( OTL) is a type of vacuum tube audio power amplifier, which omits an output transformer for the purpose of greater linearity and fidelity. Conventional vacuum tube amplifier designs rely upon an output transformer to couple the amplifier's output stage to the loudspeaker. Instead, OTLs use one of two primary methods for ...

4. 6DJ8 - Wikipedia

   en.wikipedia.org/wiki/6DJ8

   Two 6922s used in a headphone amp. Although not originally designed for the purpose, it became popular in hi-fi audio amplifiers. European-produced version of the tube is designated ECC88. An industrial (improved/higher ratings) version of the tube was designated 6922 / E88CC between 1959 and 1961.

5. List of Stax products - Wikipedia

   en.wikipedia.org/wiki/List_of_Stax_products

   Headphone amplifiers. Currently in production Stax ... Vacuum tube (2x ECC99) / Solid state hybrid, Limited Edition, 600 units SRM-323S 2010 400 V 2x RCA

6. Tube sound - Wikipedia

   en.wikipedia.org/wiki/Tube_sound

   Tube sound (or valve sound) is the characteristic sound associated with a vacuum tube amplifier (valve amplifier in British English), a vacuum tube -based audio amplifier. [1] At first, the concept of tube sound did not exist, because practically all electronic amplification of audio signals was done with vacuum tubes and other comparable ...

7. Single-ended triode - Wikipedia

   en.wikipedia.org/wiki/Single-ended_triode

   Single-ended triode. A SET tube audio amplifier. A single-ended triode ( SET) is a vacuum tube electronic amplifier that uses a single triode to produce an output, in contrast to a push-pull amplifier which uses a pair of devices with antiphase inputs to generate an output with the wanted signals added and the distortion components subtracted.