With the Class D3 amplifier and the Rigid Trans-Stabilizer, the SC-91 AV receiver presents a powerful home theater performance. In the ideal reproduction environment created by MCACC® Pro’s Full Band Phase Control, experience a new level of surround sound with Dolby Atmos®, while Ultra HD pass-through with HDCP 2.2 provides a spectacular view in high-resolution. Other highlights include Hi-Res Audio playback, subwoofer EQ, dual subwoofer preout, built-in Bluetooth™ Wireless Technology and Wi-Fi®, and Spotify® ready.