I turned off the system, plugged the Chang Lightspeed 305 into the wall, and the CD player into one of its digital outlets. And listened to the same track. The effect was not subtle: Immediately most of the musical details were restored and the highs smoothed somewhat. The soundstage spread once more beyond the edges of the Maggies.

Includes a review of two Power Conditioning: the Chang Lightspeed Audio Powerline Filter CLS 305 and the Monster Cable Reference PowerCenter HTS 3500!