May I ask you whether you have many software issue with your DX220? I am planning to buy either a Solaris or Andromeda to pair with DX 220 or Cayin N6 II. Just don't want to spend too much again for another AK player but they do have black background. thank you!
Yes, you may...
software issued... currently No, I don't any issued with DX220 Software.
It will be not as fast as current Smartphone UI.
Even I am using Mango OS (not android OS), and alrd accepted that I hear and aim the good quality music.
And if you want a more smooth exp UI, Lurker0 addon and Fidelizer Adv Purist can help you, both stabilize the CPU usage, especially on Android OS.
DX220 has two OS, the original Mango OS (only for music playing), and Android OS (need to install Lurker0 first, then can install UAPP, Tidal, Spotify etc).
And interestingly, the different OS will give you slighty different Sound Sig, especially in Mid/Vocal.
Off course N6ii will be better in term of UI exp. And if you aim more on technically and black background, u should give Cayin some weight. had and always love Cayin products.
Both DAP have capabilities to swift, Cayin for the DAC section (ESS, AKM, or Cirrus), while Ibasso (DX220) for AMP section (AMP1 to AMP9).
Both work well on Solaris and Andromeda.
I hope you have the time to demo ALL...
IMO, you should decide the IEM you prefer first...
Since ur preferable sound sig will be define by it. The rest will be a synergy search pairing...
Solaris (any model) is quite source transparent to DAP, song file, cable etc... so mixed and match will be something exciting to exp... I known because I have and willing to exp that again...
Hope you get what you desire...