Check my profile for all my current and previous devices, headphones, amps etc. I'm going to open this with a bold statement. The Z tablet is better than anything I have used and by a great margin. I am using the Walkman app and mp3 tracks at 320 bit rate. My genre of music is varied. But everything sounds sweet.
What's amazing. The musicality, separation, soundstage, power, dynamics. I'm using my Sony mdr-1r which sound ridiculously good with this tablet.
Rather than ramble on, ask some questions and I will answer them.