I might be wrong but I seem to remember that those amps had a sort of sliding bias. Like the Krell "S" series. If this is the case, then stasis would refer to the plateau of the bias curve, which is the highest bias setting. At lower power levels, the bias will drop off gradually since less dynamic amplitude is needed. YBA also uses this technique. It is efficient and can allow for extended Class A operation but getting good circuit linearity during fast transients is very difficult.
Arthur
