Ken already posted his response, but I did compare the Acme Flatwound to the HT112ER, and as far as the audible or perceived low end is concerned, the Berg seemed just as big/deep down low. Here's something I posted in another thread that is somewhat related:
Something a bit strange there IMO, given the Acme sounds SO much bigger to me than these other cabs. This varies greatly with amplification used with the Acme, so, for example, it doesn't sound quite as big as it is capable of with my F500, etc. With a typical 500 watt micro, you probably won't hear a big difference in low end extension.
Most likely, you haven't made full use of the low end capability of the Acme. If you have a Rob Allen available, check that out with both cabs (or an MTD 353 with your M9... that would do it). Also, I too feel that the 8ohm HT112ER and the 4ohm Acme are similar in perceived maximum volume (all other thing being equal, and assuming you have the absolute power available to drive the Acme to full performance), which also suggests and explains the deeper low end extension of the FullRange sucking up more power to achieve similar perceived max volume overall (again, for better or worse).
That being said, yes, for all practical purposes, the HT112ER extends low enough for most players, and has a much more meaty low mid response that also fools the ear a little bit regarding the absolute low end response.

