MrWalkman
Headphoneus Supremus
Managed to get the A45 app to work on the 1A. ClearAudio+ seems to provide a DSP effect on itself, compared to the Direct Mode of the 1A/1Z, and it sounds pretty interesting - really big soundstage and you can easily hear everything.
If there will be a safe way to do this in the future, will share more.
Some interesting info, the OS on 1A/1Z is a second version, the one on the A40/A50 Series is a third version, while the one on the DMP-Z1 is a fourth version, hence the different features/audio effects or the slightly different interface.
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