Originally Posted by James1776
I have a rather embarrassing question...My 103 has a much better DAC then the one in my Marantz NR1506 receiver. I would like to use the Oppo 103 to decode the audio signal. Am I correct in thinking that using a HDMI connection between the devices will automatically send my raw digital signal to the Marantz receiver? Should I be connecting in another way???
If you want to hear the DACs in the 103 you should do 2 things:
1) Cable the Analog audio outputs of the 103 to the Marantz, and
2) Set the Marantz to play that Analog audio input without doing any "processing" of it -- other than volume control. For multi-channel Analog input that will likely be the default in the Marantz, but you should check that. If you only cable stereo Analog input you will likely need to make a settings change in the Marantz to avoid processing.
Processing here means things like Down-mix of more input channels to fewer speakers of output, Surround sound processing of fewer input channels to more speakers of output, Crossover processing to send some main speaker channel bass to your Subwoofer instead, speaker Distance Adjustment processing, and anything fancy like Room Correction. All of that processing is done digitally, so if the Marantz is doing any of that it has to first re-digitize the Analog audio on input, then process it, then convert it BACK to Analog for output -- and that last step uses the DACs in the Marantz.
So shut all that off in the Marantz so it is acting as a "simple", analog audio pre-amp and amp.
Instead you can do Crossover processing, down-mix, and speaker distance adjustment processing for the multi-channel Analog audio outputs of the 103 in the Speaker Configuration settings of the 103.
If you have the Subwoofer channel cabled you will also need to check the volume level for the Subwoofer to make sure it is matched to the main speaker channels.
The DACs in the 103 (Digital to Analog Converters) are never involved when you use Digital audio output from the 103 -- such as HDMI audio. They are only in the signal path when you use the Analog audio outputs.