What I meant was when winisd or other software are calculating the excursion there are assumptions being made about the atmospheric conditions, the environment, the effective SD of the driver, etc...And it is also assumed that the speaker is reproducing a 100% pure signal which they never are. Some of those peak burst numbers are with 100% THD and accompanied by significant non harmonic mechanical noises as well
If you are wondering yes I noticed this same thing a while back. The LMS also hits a few numbers that it technically should not be able to based on the xmech. Though it was about 0.1 dB backed off from making mechanical contact. I have my calibrator and mics sent off to be calibrated. Also I have 4 different calibrators and all of them are within a half dB even the cheap one. I've also had guys at HSU, SVS and Powersound all match up their internal numbers to mine within less than a dB. I still don't have a quick easy answer to give.
Last edited by Ricci; 10-02-2014 at 01:55 PM.