Pokey77: I owned a Marantz BD7003 for a few years as my first Blu-ray player and loved it. I did upgrade this year to the UD5005 which is reported to have improved audio circuitry with a shorter signal path and upgraded DACs. To me the video quality is about the same but I care far more about the audio as I suspect you do.
So let me see if I understand what you're doing. You've connected the digital out of the BD7003 to the digital input of the 840C to take advantage of that unit's upsampling functionality for improved audio to 384khz. Is that correct so far? Yet you're not hearing a substantial improvement of the audio despite the claims CA make about the 840C. From all I've read and studied about the human ear, no one can hear frequencies above 20Khz so how does 384khz offer any improved sound in this upsampling feature? I am under the assumption that you really cannot improve the sound of a Redbook CD using upsampling or that it is debatable at best. The CD itself needs to be produced differently like in an HDCD, SACD or DVD-A.
So let me see if I understand what you're doing. You've connected the digital out of the BD7003 to the digital input of the 840C to take advantage of that unit's upsampling functionality for improved audio to 384khz. Is that correct so far? Yet you're not hearing a substantial improvement of the audio despite the claims CA make about the 840C. From all I've read and studied about the human ear, no one can hear frequencies above 20Khz so how does 384khz offer any improved sound in this upsampling feature? I am under the assumption that you really cannot improve the sound of a Redbook CD using upsampling or that it is debatable at best. The CD itself needs to be produced differently like in an HDCD, SACD or DVD-A.