I just bought the NW-A45, but I'm so disappointed to read in the online manual that "When there is an active Bluetooth connection, the sound quality settings are invalid. " This seems very odd. Surely most people want to tweak the audio to their liking, even over bluetooth? (Which I can do on my older NWZ-A15).

Is there any technical reason for this? Or have they simply removed the option to enable sound effect settings over bluetooth? Any chance of a firmware update to add this functionality?