@erik_squires wrote: "I'm reading @audiokinesis but avoiding commenting when I just don't know what I'm talking about. Honestly my experience with very poor measuring speakers is rather limited so I yield the floor. 🤣"
Here is Floyd Toole being much more succinct than me:
"A ripple in the on-axis curve may be acoustical interference (not very audible, or inaudible), but if it replicates in spatially averaged measurements it is almost certainly evidence of a resonance."