Quote:
Originally Posted by 3notes
No jack, why not? And I didn't understand the long reply about ohms, that went in one ear and out the other.
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Without wanting to delve too deeply into the matter, purely technically it's quite possible to install a headphone output in tube amplifiers. However, the currents and voltages in a tube circuit differ fundamentally from a transistor circuit, they are simply too high. It is therefore necessary to create an impedance converter at the preamplifier output by means of a
buffer amplifier, which opens into the headphone circuit with a correspondingly low impedance. This means that the circuitry for a headphone output in a tube amplifier is much more complex than in a transistor amplifier and therefore much more expensive. In connection with solid-state electronics it's much easier and cheaper to implement! In addition, it is much more difficult to keep the required frequency range free of background noise in tube amplifiers.