Dear Cyrilmartin, thank you very much for your research on this player. More than 1 months ago, I have added my technical comments in my audio web page:
http://digilander.libero.it/agostino.manzato/audio/reportage/sony_xa5400es/sony_xa5400es.html
Now, after about two months of break-in (during which the player improved its sound) I can confirm that I hear some problems in the high frequencies. This problem is subtable and not easy to describe. I can hear it in particular with female voices, which appear "veiled", but also with well recorded classical music, where the highs are not so shining and lively as they should be. I thought that it can be due to the OPamps output stage and I'm waiting the Wrights (Dan Modwright or Allen VSE) mods to see if they can improve the overall performances, but now you draw my attention to the digital filter in the Sony decoder. That could be really the origin of the highs problem and it should be a very difficult one to solve.
Have you tried to compare the digital output of the Sony via the Cambridge Magic DAC II with minimum phase?
Best regards, Tino
http://digilander.libero.it/agostino.manzato/audio/reportage/sony_xa5400es/sony_xa5400es.html
Now, after about two months of break-in (during which the player improved its sound) I can confirm that I hear some problems in the high frequencies. This problem is subtable and not easy to describe. I can hear it in particular with female voices, which appear "veiled", but also with well recorded classical music, where the highs are not so shining and lively as they should be. I thought that it can be due to the OPamps output stage and I'm waiting the Wrights (Dan Modwright or Allen VSE) mods to see if they can improve the overall performances, but now you draw my attention to the digital filter in the Sony decoder. That could be really the origin of the highs problem and it should be a very difficult one to solve.
Have you tried to compare the digital output of the Sony via the Cambridge Magic DAC II with minimum phase?
Best regards, Tino