It was an earlier Power Plant, not one of the latest models (which I understand are significantly better). I felt the PP reduced dynamics and added a subtle sheen to the music, even when only front-end components were plugged into it. A Sound Applications Reference Line Stage I had on hand was more natural-sounding, although it too constricted dynamics when the DSP8000's were plugged into it.

The only line conditioners I've found that do not seem to restrict dynamics are the latest Shunyata products, the Triton v3 being noticeably cleaner than the Denali's. I believe Shunyata is releasing their new Typhon QR this week, which is designed to be paired with a Triton to form Shunyata's best line conditioning system. The prior version of the Typhon worked in parallel with the Triton (i.e., it was designed to be plugged into one of the Triton's AC outlets), but the new version apparently uses different technology and works in series with the Triton (i.e., the Triton is now plugged into it, and it is plugged into the wall). I have one on order and will report back after I've had a chance to evaluate it.