Bass issues,,,,will new speaker help?

Chad,

Perhaps the "Cardas Rule" will not work in your room. I'd try repositioning the speakers closer to the wall and if that fails I'd put them on an adjacent wall and experiment there. Why lock yourself into a certain speaker location because of some rule that apparently isn't working for you???

yeah, you are sitting in the worst spot in the room. room treatments may help, also, you may want to try adding a subwoofer into the system and fine tune everything with its placement.

I have the same issue. My dip improved (narrowed the troubled band width and decreased the magnitude of depth a a little) when I added a subwoofer, though still bothersome. It improved again (decreased dip magnitude a little more) when I added passive high-pass filters to my mains and reintegrated my subwoofer, though still -6dB. I hope to improve it once more when I add a second subwoofer.

Chad,

In general, the Cardas Rule is a general starting point for speaker and listener placement. From there you must move your speakers and listening position for optimum results. When you stand in the corner, you are hearing bass that is all bunched up and lumped into a room mode. Apparently you have positioned your listening chair into one of the rooms null points and the bass is canceling in that spot. You must move your chair forward and backwards until the bass is natural, then adjust toe-in and width to suit. Of course, there is a strong possibility that your speakers are not compatible with your room and no matter what you do the bass will never be correct, but you must move the chair and adjust the speakers' positioning to give them their best shot. When you say your bass sounds hollow in your listening seat, that is a red flag that the seat is positioned in a null spot. Try moving things around and let us know what happens.