interessting, i reading this later and give it a try. I had my Subwoofer KH750DSP and my 3 front LCR KH80DSP calibrated with MA1 Multichannel (Neumann) and only had the range up to 250hz measured again by the 861 at the end. The MA1 takes into account the time and phase etc. I think I'm well positioned with the decay times, except for the 4 surrounds, which are analogue active speakers without DSP.

568.2 & 861v4 LPS etc., Neumann DSP 7.2