Sonic Defender
Headphoneus Supremus
How does the zx2 stack up against the questyle qp1r..? Has anyone heard the qp1r before ?.
I have read many impressions of both, both sound excellent, the QPR1R has a great deal more power, no streaming, and the GUI isn't as good. So sound quality likely goes to the QP1R, as does flexibility in terms of ability to drive various headphones, but the ZX2 provides Android, albeit rather long in the tooth Android, and a better GUI. That has been my understanding.
Edit: I'm sure the sound quality is close, but apparently the QP1R is pretty special.