Yep, I'd agree with that, Jerry. I think the ceramic magnet in the HT112ER helps tame the edge of lightweight heads, but the small volume of air doesn't let it pack quite the same smooth, low-end punch that the AE-212 has. And the AE-112's "neo" driver doesn't do quite as much "warming" as the HT112ER's ceramic driver, AND it equally lacks in air volume... thus the even greater "edginess" in the AE-112.
Lots of assumptions in there, probably too much engineering knowledge in my head for my own good... but that all makes logical sense to me and agrees with what I hear...
I generally agree with the above discussion. A couple of comments.
1) I hear no 'edge' that is specifically associated with lightweight heads. Very little difference any more between SMPS driven heads versus traditional transformers in other SS or hybrid heads. The class A/B LMII is about as warm and fat as they come. Other heads, like the Genz stuff, are bright and upper mid present, but that is due to a design goal (i.e., their lead sled heads sound pretty much the same) versus anything to do with the power supply.
2) Interestingly, based on many EE comments, it isn't that many neo cabs are 'bright', but rather that many ceramic loaded cabs have quite a bit of space between the top of the driver response and the tweeter crossover point. This results in them sounding 'smoother', but is actually a lack of even response (in some cases) versus a positive. It is VERY easy to soften this upper mid response if you have a head with an upper mid control centered around 1K (like the Markbass, GK, TecAmp, etc. heads). Much harder to go the other way... if there is a hole between the top of the driver's response and the tweeter, you can't EQ that back in... it just isn't there.
I continue to love the AE212... it is a touch less upper mid present than the other AE cabs, but as you can probably hear from my clips, I can virtually match the AE410 and the AE212 with some simple low mid (at around 250hz) and upper mid (around 1K) cut and boosts between the two.
In my recent trial of the HT112ER (another nice cab), I had a bit harder time with really 'changing' the sound of that cab with EQ (much harder to dial in upper mid clarity than to take it out IMO). With that cab, it isn't so much that the low end is 'too big', but rather that the mids and especially upper mids are a bit under represented.
All nice stuff!
K