Maybe you can tell us something about dimensions or battery life?

  Thank you! Unfortunately I found here only recommended voltage whereas here (about 9018k2m)    http://www.esstech.com/PDF/ES9018-2M%20PB%20Rev%200.8%20130619.pdf   I found recommended power. And I really don't know how to compare it ^ ^" can anyone help me? 

  Is it a dac designed for portable devices? Like 9018K2M?

I'm not shure where you can buy it but I've seen a few users with this adapter in ibasso threads:   http://www.head-fi.org/t/679473/the-ibasso-dx50-thread-latest-firmware-1-9-2/10305

There is a solution   

In my opinion Q5 should have double 9018K2M or single 9018. As you said before "ESS9018 already includes 8 channels DAC so it does not need 2 DAC chips".   In my opinion more important is proper dac implementation and software than the dac itself. I'm not an expert but for me investing in...

Thank you for the answers, I'll order r70x soon 

Could someone compare the amount and tightness of bass in r70x to other popular headphones? It's very important for me because to much bass really disturb me and I have no chance to listen AT before buying it. For example in HE-400i there is defenitly to much of it, whereas on hd800 I feel a...

@marcusd Are phone and line out outputs rings made of plastic? On the I generation they were metal.   http://s42.photobucket.com/user/twister6/media/twister6089/fiio_x5-17_zps4dac2d86.jpg.html

  In my opinion powdered finish was a lot nicer. But maybe fiio changed it to brushed due to the customers in China. 

For me the wheel is better way to go. For those who want a touchscreen in this price category there are good players from iBasso. I hope that Fiio won't add additional features to x5 and will focus on the sound quality and equalizer. The improvements are very likely to appear because Fiio x3...

For me option A.   And I have a question because I'm kinda nooby in electronics. Browsing XYZ forum I've read that it's bad idea to put full size 9018 to portable players and option with 2x 9018 k2m is better solution. It's because full size 9018 requires something something that I'm not able...

New design not as good as the previous one. Hope x7 will get volume knob.

Hi, I'm gonna buy DAC/AMP for Yamaha YH-100 headphones (orthodynamic, impedance: 150 ohm, sensitivity: 98dB/mW). I want to use it in my house with PC and outside with Adroid phone so it would be nice if you recommend something in one case.  Sorry for my English and thanks : )