Thanks, that's going to save me a lot of keyboard activity. And I knew that there was a Subwoofer Input somewhere. :b
Multi-channel RCA inputs
Multi-channel RCA inputs connect an analog source to a receiver or amplifier. They are primarily used with premium Blu-ray, DVD, and Super Audio CD players. These elite players offer high-quality surround decoding and digital-to-analog conversion. Their capable circuitry often yields better results than connecting to a receiver through HDMI.
A 5.1 setup has individual connections for the left and right front, left and right surround, and center channels. A 7.1 system adds connections for rear left and right surrounds. The ".1" is the connection for the subwoofer, sometimes labeled LFE for Low-Frequency Effects.
As an example, say the Oppo UDP-205 is used as a preamp in a home theater. It would connect to a multi-channel amplifier like the Marantz MM8077. Each channel uses an individual RCA cable for connection.
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Marantz SR-5300 AV receiver (rear panel):
Yes, 6.1 multichannel input. You can use a Y connector for the L & R back surround channels output of a DVD/SACD/Blu-ray player and the single end of that Y cable goes to your receiver (surround center input).
Or, usually the Left back surround is used as the Mono back center surround channel, voila.
But use the digital Coaxial connection for DD and DTS, or the analog multichannel connection for them and in addition to Dolby TrueHD and DTS-HD Master Audio.
Welcome to the world of immersive audio. It is not an addiction, it is a conception/evolution. :b