Hello
You've mentioned in the dx320 forum that you've been having some issues with this dap when using the Mango app on Android.

Has this issue been remedied?
And also, it wouldn't be "new in box" if it already has been opened correct?

Simply leaving a comment here for transparency for all

There was no problem, mango simply makes the negative balance, that is, when you turn to the left, what mango does is attenuate the left side and vice versa.
It is open in perfect condition, I am very scrupulous with this type of material, I have only used it with great care