I talked to Mr. Wolf in Munich about that. He rolled his eyes when I asked him about SP. He basically asked me why would anyone would want to stand on rollers when trying to push/pull things, which is basically what a speaker does. He said that you want to couple the speakers, not decouple them. But he said that talking to Audiophiles about stuff like that is useless, as they surly believe that they know more about speaker design then the speaker designer, and/or accuse Magico of being bias (…as bias for good engineering is a bad thing). He said that the speakers will sound different for sure, but better they will not be, unless smearing the speakers impulse covers some other issues you may have in your system, but that is only further removing you from good performance. He also said that changing the height of the speakers is also detrimental to the performance.