It seems the m3k has a problem with 128gb sd card. Even if i already updated the firmware to 1.3 and formatted it to FAT32 the problem still persists. The solution is I replaced it with 32gb FAT32 sd card and all is well and good. No problem whatsoever.

My fiio m3k can't detect the SD card after waking from sleep mode or turning it off. It says "No music found." When I tried to re-scan or browse files nothing can be found. I have to take out and re-insert the SD card for player to detect the card, the auto scan to kick-in and my music files to...

I was at the office when it happened so I don't think any water or condensation got in. It was weird because I used it earlier in the day and it was ok. A few hours later when I hooked it up with my ak240 I was surprised that no sound was coming out of the right channel

The right driver of my andromeda just died all of a sudden. I was going to use it last night and no sound was coming out of the right channel. Tried switching cables to see it it would work. Still no sound. Anybody here experienced anything like that?

Thanks for the input. Though I would love a more detailed comparison between the two. I have a qp1r and already placed an order for dx200. It seems that in terms of UI/features dx200 is miles ahead. Sound quality is really a toss-up I guess

I was planning to buy X5 3rd gen but decided to wait for the DX200, Hope its worth the wait.  Any comparisons with the QP1R? 

eagerly waiting for impressions.  i wonder if they use the same drivers as k550..

this is one fantastic review! i think i dreamt of something like this once. sad thing is my dream pales miserably in comparison with only 5 flagships. in real like i'd be lucky if i can own 4. 

i've been seriously considering getting o2+odac for my hd650.  any impressions about this pairing?

i use to own a dt770 pro 80.  i was actually curious about cop thinking that it will be an improved version of the dt770.  after reading this it seems that dt770 is still the better deal. now i'm missing my dt770 again. 

need a portable and desktop amp/dac for hd650. price must be lower than the headphone itself but can drive it to its full potential. what do you guys recommend?

...when you give someone special an hd650, and then you get furious when you found out she's not using it because she bought a beats studio, and her hd650 is just lying around somewhere gathering dust. Grrrrr!