Getting granite tomorrow.

So Doug, what are you using under the speakers? Since I moved a couple of years ago from a nice concrete floor to a suspended wooden floor (albeit decently solid), I've come to realize (despite my best efforts) that some type of decoupling is going to be needed at the speaker/floor interface since too much mid bass energy is being directed into the substructure. And, it probably isn't going to be cheap. I've tried the Herbie devices and they were abysmal in my application. The next step is something like Stillpoint Ultras or the Track Audio decoupling spikes, but now we're talking quite a bit of cash for eight feet. I'd be curious as to your approach. Cheers.

Thanks for the responses all. Doug, indeed my experiments have proved that anything that allows the speaker to move in any plane results in exactly what you and Paul are hearing. Thus far, I've found that rigid spikes allow for the best sound in my application. The Track Audio spikes intrigue me as they are offered in both a coupling and decoupling version; from my reading it seems the decoupling version can be adjusted for various mass loads, and that the degree of compliance is minimal - still as you rightly point out, anything that allows the cabinet as opposed to the air to move is theoretically detrimental. Alas, support from beneath isn't an option since the room is over the garage. Perhaps I should be focusing on better coupling between the speaker cabinet, the spike and the floor. Back to the drawing board.