I just got a set of Rollerblocks with the Tungsten Steel Balls, in the mail the other day. I was very excited and looking forward to giving them a try under my CDP. My first impressions were, Wow! more volume, more detail, more air. However, after listening for a few more minutes, it was becoming apparent that with the increased detail, came a shift towards a brighter sound and fatique. I tried repositioning the blocks into numerous configurations, but without successfully eliminating the effect. What was once a musical system was now a bear to listen to. I also tried it under my tubed amp. Now the Rollerblocks are just sitting on the side. I'm contemplating returning them. Does anyone have some suggestions!