Hi Thyname,

I have listened to the X-10 buffer with my m60s. While it did add some richness, it didn't reduce sibilance. The key word here is add. It imparts it's own signature to the sound getting you further from the true source. I'm not tube bashing here as I think there are some very nice sounding tube amplifiers, preamps, and tube output stages in cd players. However in those cases they are engineered with the component. The X-10 seems like a bandaid, look at what is causing the "injury".