[b]FS Eichmann Toppers - funky resonance suppression thingies[/b] Set of 6 funky fractal shaped alloy extrusions with fixed endcaps. They work by dissipating standing waves, and cost about £70 a set in the UK, (when available) and can be used on equipment such as CD players or speakers, even a turntable. I had mine on speakers arranged across the top front to back in a diagonal of 3 per side, they did help the focus on my very boxy old Tannoys. I have heard of them losing hum in a valve amp on one review. Sadly due to my tiny flat I rarely reach that sweet spot volume-wise without neighbours thumping my floor. Good little tweek for not much money. My mountainbike needs a new saddle so... Minty & original box £30 plus a fiver post (UK) find out more here... [URL]http://sites.thestar.com.my/audio/story.asp?file=/2005/2/17/audiofile/17topper[/URL] [URL]http://www.tweaks4u.com/product_info.php?products_id=600[/URL] paypal is cool, or a cheque.