The Onkyo HT-R640 is a 5.1 channel HDMI home theater surround sound receiver in black color. It offers various surround sound formats such as DTS, Dolby Pro Logic II, and Dolby Digital. The receiver includes features like a radio tuner, digital tuner, and multiple audio outputs including RCA, digital optical, and HDMI. With 9 outputs and 20 inputs, this Onkyo model is designed for high-quality audio performance in a home theater setup.
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