Headphone tube amplifier
The 1023A's headphone amplifier stage operates with a tube (GE5670). The latter benefits from four signal & buffer input switching sets. Naturally, this part is the most delicate and sensitive to disturbances, so it is located opposite the power supply to avoid interference and enjoy a clean and clear signal.
The headphone amplifier stage is positioned to optimize the distance to be covered by the signal up to the 6.35mm jack output. Very flexible, the device is capable of withstanding impedances from 10 to 600 Ohms, which allows it to work with most headsets, from the most basic to the most advanced.