Dynaco liquidated in 1980 — primarily due to improvements in solid-state amplifiers and a 1974 FTC ruling that changed the standard way of rating amplifiers’ power levels. But the ST-70 has remained ...

Feliks Audio is one of the few boutique brands from Poland making serious noise in the Head-Fi scene. They specialize in ...

Having built a number of vacuum tube output transformer-less (OTL) amplifiers in recent years, it seemed as though it might be a good idea to try ...

Adding a relay connection of the speakers to the output transformer would minimize a popping sound that is currently being made in the speakers when the HT is initially turned on.

It follows a so-called ultra-linear circuit, with a tap on the output transformer feeding one of the pentode’s grids.

The GA-10 is an audiophile-grade headphone amplifier that features the SEPP (single-ended push-pull) circuit with eight vacuum tubes, a linear transformer, and direct tube output. The vacuum tubes ...

The return of the backline stalwart has long been mooted, and it's now officially available for preorder, complete with a revised output transformer ...

There is also an emulated line out that is positioned after the power amp section, ensuring that when you hook it up via stereo/TRS cable, and send that signal out for recording, you duly capture the ...