More on Amazon.com : http://www.amazon.com/gp/product/B006H3SV1E?tag=purrfectcatdi-20 <br /> <br />Earthquake Sound MQB-1 Mini Tactile Transducer <br /> <br />Tranducer brings rumble effects to your chair or couch <br />Universal mounts Including chair and platform mounting <br />Flat wire aluminum voice coil <br />Rugged cast aluminum heat sink <br />15-inch excursion 22 Hz
