And where on the frequency response curve is 31hz for that speaker?? If it measures very low in db's at 31hz (as the VAST majority of any and all speakers do), then what's the point? You can throw around specifications all day if it makes you feel better, but whether it's likely to SOUND better isn't measured with that kind of myopic and meaningless spec and that's my point. Go take a look at the Celestion web site and examine ALL their speakers and look specifically at the speaker response curves which they publish for ALL their models and examine the level of response you get at those low levels. But ultimately it all comes down to what will the audience hear and what will make them not only hear but feel the bass? That's all part of what a dedicated subwoofer does which is to specifically boost those very low end frequencies which need to be felt more than heard. As I mentioned we use a QSC KS112 subwoofer which gives everyone in the room (including stage and audience because subs are omni-directional unlike your cabinet or speaker) a more than adequate low end bass feel for ALL instruments that need the low frequency boost including the bass, the low end of the keyboard, the kick drum and lower toms even though that subwoofer is spec'd at 38Hz as it's lowest response, yet at a volume level setting of 3 all low bass frequencies can not only be heard but felt in a room with a capacity of 150 people. Have more people than that...get the next bigger sub or get multiple subs. Take a look at the forest....NOT the trees.