I have a PF60 in my audio rack, which I use for all my audio components. I'm very pleased with it. However, it's located off to one side of the room, so I wasn't able to plug BOTH of my Summits into it. Instead, I use an older Monster HTS 3500 MKII (which is centrally located) for the Summits, as well as my video gear. I haven't noticed any degradation in the Summits sound with the Monster conditioner. However, I DID discover the Monster "choked" the output of my Belles amp, whereas the PF60 did not. It's easy enough to "test" the effect of the PF60, but frankly I can't imagine it "choking" your Purities.