The NAD S 170 is a surround sound processor designed to deliver high-quality audio performance for home theater systems. It supports multiple audio formats, including Dolby TrueHD and DTS-HD Master Audio, ensuring immersive sound experiences. The S 170 offers various connectivity options, including HDMI, optical, and coaxial inputs, making it versatile for integrating with different audio and video sources. Its user-friendly interface and remote control make it easy to operate.