Hard to say. USB3.0 does have more pins which allows for more current to pass through. But i think it really depends on the implementation. You can probably charge a bit faster though.

Does it really matter? In the end it's about what you prefer. I personally like the bast boost on the 650.

I have nothing to compare it to, but the A5 sounds great with my HD650. I'm loving the sound, especially with the bass boost on. Gets incredibly loud too.

Hey, i've been following this thread for a while now, but this is my first post here on head-fi.   Anyways, i ordered a X1 a while ago, and i just got this email, thought you guys might be interested;    Dear ***, We have some good news about the Fiio X1 that we would like to share with...