Primacoustic RX5 Monitor Isolation Pads 7.5" x 9.5", Flat Improves transient response Widens the sound field for better imaging Tightens up the bass response for greater accuracy The Primacoustic Recoil Stabilizer is a unique mounting device for your audio speakers that eliminates disruptive resonant coupling from the loudspeaker to the stand In addition, the RX5 Recoil Stabilizer provides a stable base that reduces recoil from the forward energy of your loudspeaker Made from three basic components, the Recoil Stabilizer is essentially a platform for the loudspeaker that features a high-density urethane base that isolates the speaker from the shelf, monitor-bridge, or stand This effectively decouples the loudspeaker to eliminate vibration-borne resonance to the substructure