Last night I set about taming the penchant for boominess in the Elacs when placed as they are about 12-18" from the back wall. First I ventured into the basement to see if I could find anything to deaden the speakers resting place on the large Target stands I'm using. Not having any idea what would do what, I found some old sheets of cork that I'd bought to make platter mats out of, and used two of them cut to the dimensions of the tops of the speaker stands. So I placed that between the speakers and stands and that actually helped out a lot. I thought it might muddy the bass but instead it tightened them up across the board. I'm going to pick up some BluTack and try that as well in place of the cork. I rarely use light/small speakers (in a system that I'm this concerned about perfecting) so this is a new territory for me. I've had these stands for ages, and don't even remember the last time I used them. I think it was under my old Kef 103.2s.
Also, it's time to fill the speaker stands. There's a lot of space to fill so maybe clay kitty litter? I'm trying to do this on the cheap because, well, I'm sick of spending money on this hobby.
Also, ICTwoody is sending me some foam to bung the speaker ports (bungholes?). Which is an awesome gesture, thank you. I cut some foam from some unused wall treatments and loosely stuffed it in the ports and the boominess went away but so did some of the immediacy and some of the lower bass, even with just a little. I'm hoping this more open celled foam that will be arriving is the perfect medium between none and what I tried. If the speakers are about 3' out into the room this boominess isn't nearly the problem it becomes with the ports closer to the wall. Something to consider if you're looking for Elacs.