dampener

Has anyone else noticed the whistling sound on Karen's serve? He uses a dampener in his Blade, and I'm wondering if it's one of those Babolat Sonic dampeners.

Does it exist round dampener with blocking system to prevent slippage on the strings, like the Babolat Custom Damp?

I have recently strung more racquets and usually I hit them against the heel of my palm after stringing them. When hitting them against the heel of my palm, without dampener, I almost always feel vibrations. The lighter the racquet the stronger the vibration. Now that we clarified the...

My string (Yonex Pro Tour Fire) is round-shaped. I know it does not provide as much spin as, say, Solinco Hyper-G. I used to play without dampeners. I was tuning racquet balance, and added a dampener (5g). Right, people do not use dampeners to balance, but I was testing. Then I could only...

currently using the wilson emoji dampeners and like the amount of dampening it gives but still gives me a good amount of feel, but design kinda bothers me makin me feel like a 3 year old (although keys uses one), tried the sampras one cos it looked cleaner with subtle designs but was too soft...

I've looked at various sites and see this dampener getting rave reviews. Has anyone played with it? They come in packs of 3 and averages about $5/per dampener. Any comparable dampeners to this?

Ive tried my hardest to find what type of dampener Mr. Nishikori uses but to no avail. Please comment the brand and perhaps the model of this dampener.