I write this review after 9 months of usage. (I'm sorry Linsoul for taking so long, yes I did receive your multiple emails :D)
First of all I have to say that this product feels very premium in the hand, the knob especially is very satisfying to turn ( it's stepped with audible clicks).
I needed a dac/amp for my pc set up to use for IEMS and Headphones and after testing I can say it can drive mostly anything without any effort at all.
I tried hooking up some speakers as well and with the remote control it made it easy to switch up between the different modes available (beware that when you switch the first times you might occur in a mode that blast music at 100% volume for some reason).
Filters didn't change much to my ears so I left on default.
For anyone thinking to buy this I say JUST DO IT, you won't be disappointed.
p.s. : bluetooth work only to receive signal and not send it