As a point of reference, where did you have the master volume set on the F500 assuming you set the gain to where it occasionally clips? Just trying to get a sense of how loud is "loud"...
Just saw this post. Again, with the preamp at just under clip (on the MB heads, you actually NEVER want to see that pre gain clip light come on), the master was between 10 and 11 o'clock (I've never had the master past noon on the F500... my guess is, that is about 85% of usable volume at noon). EQ... just a touch of bass boost on my onboard Sadowsky pre... F500 flat except for a very small upper mid boost at around 1K or so (I like my grind).. filters off. This cab is pretty high SPL, so that is pretty loud!
So, cranking pretty well, although surely not 'ear bleeding loud'... I refuse to do that. So, the volume was basically loud enough to put a full, fat low end under a band (horn section, two singers, bass, keys, drums, guitar) that was playing about as loud as the moderately hard hitting unmic'd drummer.
It didn't flinch on the slap transients at all.. nice and open. One of the things that makes me want to kill myself on a gig is going from fingerstyle to a brief slap section or really digging in (I never change tone or touch knobs doing this), and having the low end compress due to the drivers reaching their mechanical limits. This happens on most 2 x 112 rigs I've played, and even my very nice TecAmp s212. However, ZERO low end quashing with this baby... similar to my experience with my 410's.
Might the AE410 perform a touch better at the highest volume (like outside with no PA support)? Probably, but those type of gigs are few and far in between.