Which part of the 3K is now at ear level?
The mid driver's still below ear level. I'd guess without measuring it ear level is about level with top of the 3k housing now.
Does that mean you used SO to adjust tonally to suit you, because the absorption of the room surely didn’t change?
Yes, in fact I more look at SO as doing just that, different elements adjust the curve in different ways, here's an old REW graph showing things, though it's from before I knew what I was really doing, might be a dodgy mic too, and the listening position was different, but you get the idea.
I've not checked this yet but I wonder if SO also does something to change the delay from each driver.
I did tweak my SO when I realised I’d defaulted to one decimal place on speaker height from floor. I’d got 0.1m entered but the plinths are only 4cm, so I’ve now used 0.04m. It projects the midrange a bit better now, by reducing the bass presumably because SO assumes the closer position to the floor with emphasise the bass slightly. I prefer it as it was at the moment. But the beauty of SO is it’s easy to switch between two profiles.
I wonder if this is partly due to the delay factor as well. I'm a little hesitant because the more and more I poke SO the more I think it's more granular that people perceive, you'd need to see what height change the "it's the same profile" bug kicks in.
I've not done the maths, at some point changes in 3 dimensional positioning are going to have minimal impact depending on wavelength. Clearly the higher frequencies are going to be effected more by positional changes, however SO targets lower frequencies. Not sure how high a frequency (does anyone know?) but looking at the wavelength might help us target what movement is significant. Previously from memory I think moving the speakers less than 10cm caused the "it's the same profile" bug to occur, so that's less that 800Mhz. Maybe that's near to the limit given the graph above shows a change at 500Mhz or 3cm.
I've got a couple of 10mm MDF wrapped sheets coming this week to help with the stability on these platforms, once they're in I'll do a bit more tweaking, mainly I think this will be virtual tune dem - I don't think I want to push the speakers any higher than they are to be honest, I think things will get too unstable, and anyway if I slouch a little now the improvement is very marginal, think using SO is more sensible.