Get a couple of hardwood butcher block cutting boards that are just a little bigger than the base of your speaker stand. Add spike kits to them to pierce the carpet if you need it. On bare floor put Vibrapods under the wood slabs. You can get butcher block cutting boards in thicknesses from 1" to nearly 4". I have a 3-1/2" thick behemoth under my turntable.
Oh, and if you do it right, it'll make your speakers sound better too. A maple butcher block cutting board has just the right density to drain vibration and keep clarity without adding midrange glare as you might with granite. If you shop at Overstock.com you'll also save a lot of money over most alternatives. I got my butcher block there for about $89, a fraction of what a Mapleshade or other platform would cost.
Oh, and if you do it right, it'll make your speakers sound better too. A maple butcher block cutting board has just the right density to drain vibration and keep clarity without adding midrange glare as you might with granite. If you shop at Overstock.com you'll also save a lot of money over most alternatives. I got my butcher block there for about $89, a fraction of what a Mapleshade or other platform would cost.