Hi everyone. I saw a thread from audiosciencereview that i felt annoy and unfair for this headphone amplifier and F.Audio brand. After 3 months with this amp, i've satisfied enough to write a review, i hope my review was written in right box in this forum. I'm not a pro reviewer so if there are...

Im going to upgrade my dap. And Xduoo X3 II and Zishan DIY with AK4497EQ look good at price range i want to pay for. I wondering between these two, please give me some advice. Thank guys Zishan DIY...