We discussed this at length earlier on this forum; exactly what constitutes bass and how low in frequency a speaker must go to reproduce the entire orchestra. We never really came to any conclusion and I find that peculiar. If the lowest note on the string bass is 31HZ why do we need a subwoofer? I think you have it right. Not for accuracy of reproduction but to accomplish another end. That of pushing the thump. There's bass then there's thump. It amazes me that guys who swear they are after absolute accuracy in frequency response and show graphs and charts to prove that will add something onto the speaker that is absolutely innacurate. The Thump machine. Lot of money in those subs; especially if you add one onto an already existing system. If your speakers are already flat through the normal bass region; what exactly are you accomplishing? EQ; thats what.