In a recording studio, you can easily place echo after the entire tube amp has firmly established the Basic Tone. You also need level and eq control after the amp, just like in the studios. But programmable, so you could have a quiet cranked-amp tone and a louder clean tube amp tone. This would amount to level control independent of tube amp saturation, just like in the studios at the mixing board. The current paradigm of programmable effects placed before a tube amp leaves you with no programmable control over the sound level coming out of the speaker cabinet.
Clean tones are always quieter than saturated amp tones.
A speaker isolation cabinet followed by programmable level, eq, and digital effects solves these problems. For 2112 fans there is also a DOD 2112 amp. Solid state, unfortunately. Sent to the Digitech mailing list. I'll give this design to ART as well.