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OTL, Output Transformerless Amplifier User Group.

RE: The heat of a headphone OTL amp....

"- heat: i'm afraid of heat issues and figure this would be a released in a minor way in a headphone amp.

lastly, does heat released ever interfere with the sound, somehow 'get in the way' of what one hears? (this would be more of a general question on the matter, i realize)"

Without heat, the tubes will not operate, so it is simply a necessity for operation.

It's pretty tough to speak to how much of the flavor of an OTL amp that you'll get out of an OTL headphone amp. Generally OTL speaker amps are considerably more complex (not necessarily in a bad way), as they have to deal with the bizarre impedance curves found in many hifi loudspeakers, and generally several output devices are required per channel to adequately drive a pair of loudspeakers. (Headphones are pretty well behaved in terms of impedance, and a strictly high impedance headphone amp can be built with one triode per channel)



Edits: 08/12/14

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