The music I have played so far has been acoustic, voices, horns, piano, drums ect. in CD, SACD and streamed in from Mac both in stereo and some mono. Etta James, Ray Charles, Van Morrison, Norah Jones, Stevie Wonder and BeeGees.In all cases added phase info adds to marked difference in articulation of voices and instruments. Besides stage width and depth both being increased another benefit was that music seems to come from a sphere from each speaker instead of being flat in nature. The stereo separation is improved no matter the position or room you are in. It just reminds me of all the live music i have been graced with listening thru the years. This weekend i plan some rock and classical music to hear how it is effected. One caveat from my experience was when I moved the qol unit from between my ARC LS-27 preamp and ARC DS-450 amp to before the preamp the air and soundstage collapsed. A Cardas Clear 1/2 meter IC arrived so that i will be trying to see if this was cable related or did i somehow miss connect it. Live music has always made me want to get up and dance and I now realize the phase info must be the ticket to ride and what has been lacking in all stereo systems. I know it is fairly expensive and it goes against my audiophile nature to simplify and here you add a box and a set of cables. But this for me is it!!! After some more time and use i will write again about how cable and position came out.