Hello everyone,
Thank you all for your positive and insightful posts in this very long thread. Today I feel obligated to share with you about this interesting finding.
Last week I downgrade my ZX300 fw from v.2.02 to v.2.00 (factory default) then v.1.10 (the older not available anywhere).
- v2.00: sound quality almost no difference with v.2.02;
- v1.10: significant improved sq. Just plain, natural, dynamic, raw music with DSEE HX standard on, Dynamic Normalizer on. Sq is much better, more dynamic, much more natural, wider soundstage and more musicality.
Cons: fw 1.10 does not support Vinyl Processor (useless function though, as this distorts the sound a lot), playback screen with high peak mode, BT aptx receiver function (I think so as I do not care about wireless connection for music. People spend a lot on expensive occ, spc, silver cable just to have pure music and wireless cannot even compare with normal cable in transmittance, but for ease).
Long story short. If you want better and simply pure music, you may give it a try. Just plug in and connect, simple and easy. The firmware is still available for downloading on Sony' website at:
http://walkman.update.sony.net/fw/pc/ZX300/NW-ZX300_V1_10.exe
I did the downgrade and upgrade for a few times (at least total 7 times) to compare sq before conclusion and sharing, and experience no difficulties or harm to my dap. The music data is kept secured also without the need to erase or reformat.
Best,
Khanh