Crossover point of 5.25” vs 6.5” in two way bookshelf

I have some eminence 6.5 inch alpha beta speakers go to 5 k without breakup.depends on how there designed. Shorting rings neo magnets ,underhangs, x max , vas, voice coil windings, compression,wattage ect. I would bet sonus faber has a fantastic sound room like jbl to do testing.i went to Phoenix AZ  lmc and listened to one of thier top models on burmester and big mac stuff. It was under pink floyd Pic of the prism or dark side of the moon. Well over 100k for that. Too bad I dint play for the suns I could have bought it. Nice people at lmc in the big city great stuff and one of the largest mcintosh  burmester dealers around. Enjoy the hunt. The ribbon planar have less mass respond faster. Ps audio had there ribbons made of teonix just under beryllium for modulus. Yamaha new material like teonix textreme is light quick response and push cone breakup out further.i still have the beryllium  ns 1000 yamaha as it's a great design. Final acoustics now has thier whole panel out of textreme. Jbl makes some of thier horns out of it 3800 model. I have a few of the horns emenince made of textreme then b& c bought them they quit that line. Enjoy the hunt and the science

I am not sure I agree with OP that the specs offered by SF seem backwards. A larger diameter woofer should beam at lower frequencies but also allow for higher power inputs. The tweeter should Ideally cross lower to preserve wide dispersion before breakup or beaming in the woofer occurs, but that stresses its power handling.  If SF is using the same tweeter then the higher crossover frequency is probably intended to reduce strain on it at the higher power levels expected from the larger woofer and enclosure.  What this tells me is the 5.25” model is probably a better option if you don’t need more volume or bandwidth than it can comfortably accommodate. 

Just two things.  One, there’s lots of excellent 2 way speakers with 6.5" class mid-woofers that sound really good.  Second, remember that the tradeoff for a low cross point is also reduced dynamic range and higher distortion.  It is a "compromise" no matter how you do it, but so is every single speaker out there. 

@erik_squires 

It is a "compromise" no matter how you do it, but so is every single speaker out there. 

Exactly right.....no free lunch.  Speaker design is twisted game of whack-a-mole.

Well I’m not sure what the actual crossover point is (lol)… but I picked up the Smaller Sonetto I’s and they sound wonderful paired with the SVS micro 3000 and Rotel RA-1572mkii. My room is not huge and I don’t listen at rock concert levels so the smaller speakers are more than enough I think.