Tactile transducers provide audio without visible speakers.  Frequency response of 20-20,000HZ (depends on mounting surface) Typical 400-20KHZ.  with impedance: 8 ohms, max power: 50 watts.  3" diameter with case depth of 1" (with attachment bracket, depth is 1-1/2").

Weight: 2.4 lbs per pair.

NOTE:  These hidden speakers are installed behind the wall and may be inaccessable for service.