I will try to detail some of the philosophy behind this new design in this post.

Valve amplifiers often have fairly poor behaviour near or at full power, and especially for a period after time after even brief clipping. This is responsible for the well known phenomena of valve amplifiers "falling apart" or "turning to mush" into a difficult load or being used near their power limit.

The occasional clipping isn't itself the problem - in fact this isn't even normally noticed. The issue is the long recovery time most valve amplifiers exhibit after the fact. There are actually a few mechanisms responsible, and unfortunately they all interact to make the whole problem even worse. If a valve amplifier is being used near its maximum output power, it is likely these problems will show up.

This new design eliminates these issues allowing much more apparent dynamic range and no "falling apart" even when tasked with driving a horrendous load. The resulting amplifier is solid-state like (to the point where it's uncanny) in its bass grip and damping, yet retains the pleasing low-order harmonic profile of a valve output stage.