These modules sound pretty good. I A/B them with my Presonus MP-20 and the 110b's stabbed the Presonus in the face, broke all it's limbs and then buried it's body in an abandoned coal mine. These modules sound TOUGH! They left the Presonus pre sounding flat and boring. The Auditronics modules have this fat sub 60Hz low end, I just ran some CDs through them and i could feel the kick in my chest! there also is a little presence boost somewhere in the 5-10K range which made the vocals sound clear, more detailed, and stand out from the rest of the mix. The Presonus did have a hint more HF, 15K and up, detail, but the Auditronics high end is still really smooth and clear.
The EQ's are frickn' sweet too. They are passive inductor based kinda like a cheep Pultec. The HF control gives you a choice of 7.5K or 12K and you can crank the highs up all the way and it adds this sweet air without getting harsh. I'm not sure about all the specs, but my ears love these modules especially since I payed about $120 each for these!