Any owners of Soncoz QXA1 headphone amp?

[Norville]

I just bought a barely used Soncoz QXA1 headphone amp and wondering if I made the right decision.
There is nothing written from actual users of this amp anywhere which I can find and I've search many forums.

If there are any owners here, could you write a few sentences on how you found it.
My only concern really is the build quality and QC since there seem to be a few people who had problems with Soncoz DACs.

 

[Ctjacks336]

I bought it when it first came out. There was an extremely loud pop every time I turned it on,so I returned it