I just got an assembled X-12 pair in the mail today. Build quality is excellent. Not much time to mess around with them yet, but I did have a chance to check them out for a few minutes with an SM7B. The only other pres I have in the room at that moment are the pres on my Toft ATB. So I tried that first, and it sounded pretty good. Plugged in the X-12 to compare and HOLY S*** did it sound good. Huge and very detailed. I'm looking forward to putting some distorted gtr through it later tonight. I'm already thinking about picking up another pair, or maybe one of the X-72's. - posted on Gearslutz forum