Tectonic Elements TEBM35C10-4 Miniature BMR Driver. The Tectonic Elements range of BMR® Drivers are unique full-range audio loudspeaker units. Exhibiting an extended frequency response and wider directivity when compared with typical conventional drive units. The benefits of Tectonic Elements bending-wave technology and pistonic mode of operation combine to produce an ideal solution for audio applications that requires a full range high performance compact acoustic solution. ideally suited for a wide range of markets, including consumer electronics, professional audio, automotive and industrial ‘.. Features ; Benefits. 100Hz - 20kHz. Extreme wide directivity - 180°. Applications:. Portable Speakers. Sound bars and stands. Flat TV speakers. Conference speaker phone