This Might Not Exist, Any reasonably priced, smaller speakers with 100db Sensitivity?

95db sensitivity, not big, 700/pair

With 2 watts, you'll probably be sitting at 90db-ish with decent enough bass in that 12 by 10 room.

https://tektondesign.com/product/full-range-speakers/monitors-loudspeakers/mini-lore-monitor/#color

If you wanted 100 db sensitivity for a similar cabinet size, it will be a bass-less speaker (such is the physics).

On the same note, 3.5 Watts sounds like a lousy amp.

Try something like this instead, 10 watts @ 8 ohms, 15 watts @ 4 ohms, 30 watts in mono mode.

https://www.schiit.com/products/gjallarhorn

"Full range driver" = compromised in every range.

There are different tekton models. The moabs i currently have love high current, but, a 100 watts or so should be plenty, they don't needs 1000s of trash wstts. But, i believe the Perfect SET Tekton models (though having the same sensitivity as a moab) were specifically designed for flea...flea-flea-flea of flea watt ( lil weener special). Call Tekton and he may give you the technical scoop on what he had to do...to satisfy the needs of the lil weener watt pilgrims. 

I much prefer this small amp with a full range driver such as the Omegas. (and I much prefer the Tektons with high powered solid state)

This may be another option that’s not too big, probably overpriced a bit (gotta pay NYC rent, unlike the Tekton dudes who are set up in a farm middle of nowhere Utah)

https://ojas.nyc/collections/frontpage/products/klipsch-x-ojas-ko-1