You know; sitting them againsnt the rear wall I have not noticed a lack of bass with SE compared to a push-pull amp or SS. Different bass and somewhat looser but to my ears it seems to go equally as low. Which brings up this question. I hear people say that this or that speaker goes down to 35hz or 30hz. Without having something to measure the actual number such as the HFNRR record or something similar; what to your ears enables you; or anyone to tell where you are in the frequency spectrum? I can hear low tones from recordings I know to be representing fundementals; but discerning that your speakers are playing say, 25-30hz; how does one know? Unless you have a proven recording that you can point to as an example; say the big bass drum in Pictures at an Exhibition; the Great Gates Of Kiev; I personally can't distinguish exact low notes. Something to me either sounds powerfull in the bass; or it has that punchy lower/mid- bass sound; or it has the sub-woofer rumble. But I don't hear real bass like a pipe organ in any current music that would inform me of very low tones. Here's an example. We spoke about the fact that Altec's are weak in the bass; however I tend to favor their lighter touch with acoustic low tones over some of the more overwhelming examples of bass reproduction. It just seems more natural to me. Same with the Theater 4's, they have a nice touch with bass but they don't do that sub-rumble thing people seem to favor. Since there is not much recorded music below 30hz; what are we trying to accomplish by tuning the bass as low as possible? Any thought's?