I have to agree. Since I have a pair of HDN112's, I added a Ref 210 and then paired that with one of the HDN112's. It worked great even though the Ref 112 is the optimal match for the Ref 210. So essentially I have a modular Ref/HDN 322. It exceeds my expectations. I get the definition from the Ceramic 210 on top and the HDN 112 delivers a bit of 1x12 Punch down low.