Audio-Technica’s Pro-37 is one of my surprise discoveries. It has a very flat uncolored response through the low end and midrange, with a small rise at 10-12K and a smooth fall-off above 15KHz. The general sound character is KM84-ish with a slight HF lift. It is quite flat off axis. It is high output, and handles loud sources without strain. It doesn’t get splashy with an enthusiastic cymbal hit, for example. Good value at $130 street price. Sound sample here.

The curve overlays the KM-84 without the latter’s dip at 10KHz. Perhaps because of the larger rear vents?    Green = Pro-37 #1,  Cyan = Pro-37 #2,  Yellow = reference EMM-6