Hmm... Did you received it after try to update firmware?

@fengwei007 Maybe You know how to contact with Mr Sang? Just wanted to ask a few questions about one of his product:)

What can I say.. It's way better than original "classic 2". More separation, sounds have "weight". Demands correct placement where gold contacts, or may cause heat and drain battery. More powerful, it's at "3" instead of "4,5/5" as earlier. But cause noise due to sensitivity when charger is...

Greetings everyone:) Can somebody tell me something about this amp? If you're using it or used of course:) It's supposed to be "blue angel".

I'm not far in this theme too, bought my first zishan two months ago, but I suppose everything depends on earphones:) For example, I have 3ba-driver handmade iems (initial model, which can overcome easily many 250$ chinese iems and maybe a bit more expensive), invented by our local siberian...

If I'm not wrong: 0.3 is the last:) Got it, many thanks, Setmagic!

Greetings everyone:) Can somebody help me and say is this original op1622 implemented in this device? It's closer to finished product, as I understand? Did somebody change em to original? Or I must change lpf only?