made vacuum tube head phone amplifier utilizes only 1 triode (6C45Pi super
tube) to drive SILK interstage line output transformer that has specific
output impedance to deliver the best drive to each high-end headphone.
Any output impedance to exactly match your head phone from 30 ohm to 600
ohm can be ordered specifically.
The audio circuit
contains only 1 active component, that is 6C45Pi super tube, and just
three more passive components, one volume control, one bias resistor,
and one interstage line output transformer. we feel that this could be
the most simple circuit ever implemented. The most important element to
successfully implement this scheme is the quality of Interstage line output
transformer. In this case we dedicate to wind SILK I-541-H from best selecting
material and winding arrangement in order to achieve ultra-wide bandwidth
in term of frequency response (from 10Hz to 80,000Hz at -3.0dB) while
keeping the insertion loss to the minimum. The SILK interstage line output
transformer performance is so great that we do not have to apply any negative
feedback; therefore, this head phone amplifier will deliver unsurpass
listening pleasure and purity that contains unmeasurable distortion. While
prolong listening to head phone with disturbing IC circuit or transistor
with heavy feedback amp or tube circuit with capacitor coupling can cause
inevitable listening fatique, this effect is minimized with our design
of zero feedback, zero capacitor in line amp.