The Yamaha RX-V870 is a 5.1-channel AV receiver that was a groundbreaking model for home theater enthusiasts. It supports a full 5.1 channel surround sound system and was notable for including Yamaha's original CINEMA DSP technology in conjunction with Dolby Pro Logic.
Key Features of the RX-V870's 5.1 Surround Sound:
Channel Configuration: The receiver provides amplification for five main speakers (front left, center, front right, and two rear/surround speakers) plus an output for a separate powered subwoofer (the ".1" channel).
Audio Decoding: It features built-in Dolby Pro Logic Surround decoding and later models in its general timeframe (or using the same chassis/model number in different years) were advertised with Dolby Digital and DTS decoding, essential for early 5.1 source material.
Power Output: The receiver delivers substantial power, with a surround output rated at approximately 80 watts per channel to the front and center speakers, and 25 watts to the rear (surround) channels (into 8 ohms).
CINEMA DSP: The RX-V870 was the first Yamaha receiver to utilize CINEMA DSP, which added refined soundfield processing to the Dolby Pro Logic Enhanced mode. This allowed users to replicate the acoustics of different environments.
Controls for bass and treble are on the face unlike newer units which are software dependant.