Speaker Spike Floor Protectors, Asonlye Isolation Feet, 4x25mm 24K Nickel Plated Isolation Stand Foot Cone Base for Audio Turntable Speaker CD AMP

Evil sharp so beware of floor. Install two, set floor protectors for those three rock the speaker to set the other two. Never install all four and then try to place on floor unless you have someone to hold the speaker up while placing the protectors. Isolation is superb.

cheap simple *usable* floor protectors.