This is a must have for any recording engineer or producer who owns studio monitors. These go underneath your monitors to isolate them from the surface they are on to provide you with a more accurate response. I use these with my KRK Rokit 6 pair and my Yamaha HS7 pair, and the difference in sound is astonishing! These are truly a necessity to have if you are serious about your music! Not only are they important to your arsenal for those reasons, but they are affordable too! Very happy with this product!