There are plenty of tube amplifiers now being manufactured, with a popular choice being headphone amplifiers ... in for the op-amp buffer role, making for a very simple circuit.
The HiFiMAN SERENADE Wireless DAC/Headphone Amplifier offers lossless streaming over Wi-Fi for $200 less than its predecessor ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback