It was with considerable interest last month that I set out to track down where in the world there are still factories making tubes. My research found them in Slovakia, Russia, and China, and it’s ...

The project is known as NP-100v12 which refers to a simple headphone amplifier built around the 12AU7 vacuum tube. The 12AU7 is also known as ECC82 in Europe that is popular in the audio world since ...

Despite the oldest solid state audio circuitry now qualifying for a pension and a bus pass where this is being written, the thermionic tube retains a foothold in the world of audio — cherished by ...

The amplifier project utilizes vacuum tubes on the preamplifier section to produce a push pull output stage while using point-to-point connections. Each of the tubes are consuming 940 mA of current ...

I don't know how good they are, but you could check out the bottlehead kits. I have not heard them nor tried to build them, so I'm not much help there, but I though you might want to take a look.

Do you own high impedance dynamic driver headphones? The Drop+Xduoo TA-84 OTL Headphone Amplifier is one sweet bargain at only $349 and it even includes a DAC. Products like the Drop+Xduoo TA-84 OTL ...