Used for a subwoofer Bose the result is surprising! I use this box for over ten years and the difference in sound is there ... the bass is deeper and restitution suffers! The establishment is delicate for "targeted" against the spikes (which are of a slightly smaller diameter than the diameter of the base of the tip) For the establishment (being alone) I pasted 4 pieces adhesive patch (type or Pritt Tesa) to secure the sets and perform the installation without having to "aim". The box is obviously difficult to move after the establishment ... very effective anti vibration system.