It goes without saying that every EQ is only ever as good as the measurements it's based on (
MMM works a treat IME, even if you only have a 0° mic cal file, that just makes the measurement a bit more cumbersome), and it can't fix actual dispersion issues or poorly suppressed breakup modes. (Obligatory endorsement of woofer series notches goes here.) You also need to keep adequate headroom for it (PEACE is good for keeping an eye on levels).
I would definitely want to address the substantial low-midrange dip (a single low-Q filter should do it) as well as the utter lack of much of anything below 100 Hz (the 50-100 Hz range is super important, and I'd want decent coverage to ~60 Hz at least).
I just came back from measuring some
Panasonic SB-PM01 micro stereo speakers from the very early 2000s, which had recently been liberated from being stuck behind the monitor for years and then even found their way onto DIY desk stands (
fancy!). Despite some reference level tweaking, 13 bands wouldn't do it, so I ultimately resorted to throwing 17 bands at the automatic EQ and later adding an 18th for manual bass boost sub-100 Hz... these are little 4" jobbies from a quarter century ago, not that much going on down there by default. They sound like a million bucks now - well, proverbially anyway, but I was definitely quite pleased with the result.
Only the BH3857AFV electronic volume in the SA-PM01 CD receiver unit is clearly not up to dynamic classical, it's getting quite noisy if you crank it. (Hey, it's an old micro stereo that was bought to accompany an Athlon 1200 system if memory serves, or at least moved to PC duties fairly quickly. These never were intended to be "real" hi-fi.)
Hey look, somebody has even gone to the trouble of developing a
crossover mod for these speakers. Yeah, the stock response is quite...
lumpy, so you can see why I needed a gazillion bands. Honestly, given the single capacitor XO I'm surprised they sound as good as they do now... yay for direct sound in nearfield, I guess. (The midwoofer also seems to be quite well-behaved, with severe breakup only at 8-9 kHz.) This might still make a decent project. Unfortunately I have zero crossover parts laying around so would have to buy everything. At this point I'd rather want to sort out the hissy amplifier situation first.