Yeah the TL806 was specifically designed for the parameters of the original EVM12L. I don't take the "they were designed for it" part TOO seriously because the 12L has been like 6 fairly different sounding speakers over its lifetime (original/Series II/Classic, Mesa, Fender, ProLine/Black Label etc.) with the major constant being the frame and 200W+ power handling.
But the cab works very well with that general class of speaker. So does the closely related Mesa Thiele.