Custom Design KEF R3 Speaker Stands (Pair) Custom Design KEF R3 speaker stands are designed to position your speakers at the optimum height and provide a complete rigid, isolating platform for the speaker to operate at the best performance possible. The KEF R3 5 column design is made to provide total integrity and a solid foundation. Isolation Points Speaker stands resonate the most in their center, this is why Custom Design have designed the KEF R3 stands to have isolation points in the corners of the cabinet; the top plate is also designed to complement the design. To further reduce any unwanted vibrations the 76mm central column can be mass loaded easily using Custom Design's Inert Filler and the 4 satellite columns create a firm and rigid structure. Design The Satellite.