I have and I've settled in a really good spot, I think. Back to using just one sub. If I left it at old settings (42 hz low pass, gain at about midnight I'd guess), it seemed to overpower the rest of the presentation, even into the midrange. Guitars and horns didn't seem to have as much bite. So out of that experiment, I went back to no subs. So I tried one last thing - I backed the crossover all the way down to 34 Hz, or about as low as it goes. Dialed the gain back just a tad, and I'm really liking it. Dynamics in the midrange and that "pop" these speakers can deliver is all still there but that last bit of foundation in Classical and Electronic music is fully formed, doesn't overpower anything, and it all works together nicely. Didn't run any measurements, just purely going on listening enjoyment. I think I'll stick with the single sub at this point. Maybe down the line I'll go with a more musical unit like something from JL Audio or REL, that lets me set an even steeper crossover point (SVS is 12 db/octave, I think). And I can say I've almost worn out the new Tool album down in my room. While it's not perfect throughout, it absolutely lights the room up with excellently recorded percussion, and has been a great reference for the tweaks I've been trying out with the sub arrangement.