I read TNT to say that the 1000 and 1100 are better than the Sonic Impact T-Amp and that the 1100 is an improvement. If the 2100 is better still I would certainly like to try it out. I wish TNT would follow up with a review of the 2100.
So far there aren't any reviews from audiophile sources, only a few writeups from computer sources. Scythe website says the 2100 uses a new PCB design, which of course it would have to with the incorporation of bass, treble and other functions.
Since it doesn't have a tone control defeat, it is possible that it doesn't sound as good as the 1100. But in the context of new silly-cheap $60 amplifiers, I may get one. If I could find another now-discontinued 1100 I would probably get that, although the addition of the bass and treble controls might be a welcome addition for my intended patio application.
Steve