Thanks for your detailed reply. I agree with everything.
Just a note that I don't have any concerns to EQ my Sundara.
It's just a fun exercise to see if I can develop my own system to EQ any headphones I want.
I do this with speakers and advanced digital room correction with Earthworks mic (Acourate DSP software).
My measurement shows group delay issue at 5.7 kHz and you see this in everyone's measurement.
But my main point is none of them show you the measurement with EQ in place - something I can do.
Amir doesn't measure with his EQ in place. Oratory might but that's not what we see in his plots.
AutoEQ doesn't at all - it is all simulated results.
I really like my combination EQ I shared in
post #637 (a combo of oratory and crinacle).
I'm curious if this measurement can become my new 'target' curve , can I make more headphones sound good / like this , if I EQ to this. Paying attention to group delay issues, to assist with areas not to EQ.
I'm only at Day 1 of my flat plate method LOL .
Just a fun exercise - nothing too serious here
But yes, like any measurement - garbage in = garbage out. There are definitely issues with my rig at Day 1 but it seems to pick up the broach/macro issues that show up in other measurements.
I'm not concerned about fine-detail EQ.
And any major bass issues will be obvious to me by ear with listening to music.