I received an order of 16 50 duro cones and put them under my speakers and subs. Wow! deeper bass, longer decay, fuller, cleaner sound, beautiful. I am just now placing an order for another pack of 16 for under my electronics. Thanks again so much for the tip guys, I've tried lots of footers, these outperform everything I've tried, and for about $40 a pack it's the best bang for the buck I've experienced.