The Onkyo TX-SV 636 is a multichannel audio/video receiver that was released in the 1990s. It is designed to provide a robust audio experience for various home theater setups. This model includes features such as Dolby Surround decoding, which enhances the surround sound experience and makes it suitable for viewing movies and listening to music in multi-channel audio formats. The TX-SV 636 has multiple audio inputs, making it versatile for connecting various devices such as DVD players, video game consoles, and additional audio sources. It supports a range of speaker configurations and is capable of driving up to 5.1 channels, providing an immersive soundstage. The receiver's build quality is generally sturdy, reflecting the brand's focus on durability and long-term performance. It comes with tone controls and the option for dynamic range compression, allowing users to customize their listening experience.