First and foremost, I am not a tweaker. I can't tell between digital cables. I've tried power cords and they've failed to capture my attention. I have had Audioquest's Little Feet, and I'm not sure if I heard anything there. I can't tell between video cables either. But these carbon fiber cones are a marvel. Don't ask me how or why it works. It's not soft and cushy to absorb shock...they don't end in pointy tips to pierce into your racks. They just work. a little history first..... I bought these cones three years ago, in a time when I was heavily into A/V and I was tweaking alot more. I was upgrading left and right, believing with each purchase that I was hearing differences that justified the expense. I concluded that BDR cones tightened up the bass dramatically, easily heard with Natalie Merchant's "Tigerlily." After graduation, I lost interest in A/V and I stopped posting here. I ended up taking two years off. I stopped listening critically, stopped reading mags, and I stopped buying gear altogether. Well, I'm back. A post in the Source forum re: difference between transports prompted me to do a test of my own this morning, to see if I can hear differences. I found that although my Arcam Alpha 7 cd player was somewhat better in the bass than my Onkyo DVD changer as transports, the BDR cones under the Arcam provided the highlight of the day. Sometimes, differences can be so subtle that you could convince yourself you're hearing it even if you're not. I know what that feels like. But not these cones. The bass was so much tighter on Leftfield's "Leftism" - track 2, it was unmistakable. Each thump of the drum machine was punchy, distinct and focused between the speakers. However, non-bassy tracks made it hard to tell if I was using cones or not. It made no differences to me for the trebles or vocals. $25cdn each and you need three. A cd player $80 more would not buy you this increase in performance. Anybody in the Winnipeg area wants a demo, I'd be glad to do one. I'd love to confirm that I'm not imagining this.