The Polycom® HDX 9000 series is clearly the best; offering a video solution for nearly any application. It delivers the richest audio, clearest and sharpest video, most transparent technology with easiest user interface. The HDX 9000 series is built on High-Definition TV (HDTV) standards that enhances the overall viewing experience and eliminates fatigue. This exceptional experience also applies to sound with Polycom's patent-pending Siren™ 22 audio and StereoSurround™ technology.