Jubilee thd @ 115db/1 meter ? in 2-Channel Home Audio Posted July 18, 2022 1 minute ago, Camplo said: If you have used the Dats V3 you'd know that certain information is needed for it to function properly....You'd need Mmd, piston diameter, or similar. The most accurate method (added mass) cannot be done period...I'm not putting putty on my Axi diaphragm... you? DatsV3 won't tell you xmax or xlim, those are the very important to the process....I have a lot of the information filled in by now. Some came from the video on the Axi found on youtube...Some guy in the forums got ahold of the engineering info and passed the theile specs around. At the moment I have been relying on thd measurements and my ears, to guide me to a proper xo over point. OK just curious. I know you are new here but why don't you fill out your system specs under your profile?