Mark Wheeler has posted a review of the IPC EAR Disc Energiser CD treatment product ($495) at TNT Audio. His conclusions:
“After treatment we were disappointed that nobody heard any pianos getting heavier or better defined, any bass deeper or more extended, nor more precise intonation as others have reported. No listeners heard the sound becoming more analogue, all missed the improved harmonics and all failed to notice the reduction of sibilants too. Even when listeners were invited to notice such things, despite the expectation of confirmation bias, none of these phenomena were observed.”
You can read the full review here.