I have another question; about waterfall plots... (Picking on Core 47 and 8351B and posting in this thread as they're in families of speakers I'm still considering as a purchase!)
Dynaudio Core 47:
Genelec 8351:
(1) Is 0 on the Z axis where the impulse would be? Or are these not aligned like that? (i.e. time isn't absolute)
(2) Am I right in assuming the levels are arbitrary and it's just relative decay we should be looking at? Looks like the Genelec starts at around 95dB and the Dynaudio around 85dB (but maybe that's because on the Dyn's graph the first slice is "later" even though the time value is earlier, as per (Q.1)?)
(3) In any case, I'd say while the Dynaudio does have more resonances than the Genelec, the "fat-ness" of the graph below about 800Hz is radically different. Assuming more is worse, the Genelec looks worse. Assuming scaling isn't throwing me, does anyone have any thoughts on whether this might mean the Genelec isn't as "tight" as the Dynaudio around 120 to 800Hz?
I imagine at low frequencies having a few ms of decay isn't an issue as the wavelengths are long compared to such decay, and I'd expect decay to increase with wavelength, but in that upper bass / low-mid band I'd have thought it may be audible, smearing in the time domain?
Thanks!