Specs my man.
My employer is a dealer for QSC, Peavey, JBL, EV. We have real world specs for all and have bench tested all, as well as doing listening tests with reps present. The Peavey rep had a big stilly smile on his face when the Peavey mopped up the floor with the QSC.
I did not say that the K12 wasn't a good choice. It is. I like the plastic HF diaphragm. It is does not ring.