Also it required the development of closed earphones. (Train and airport) But, it is good to use when active. (ISINE10 & 20 & LCD-i3)

That's COOL

James Great Welcomes the large-capacity battery. (5000mAh) Improve sound quality. comfortable Screen. (3.97inch) Touch panel? Test of the response is very important in this case. response is poor → STRESS I hope also to Bluetooth remote control.   Capacity is sufficient. Dual...

I'm looking forward to

Thank you for reply. I understand.   I hope the native DSD playback also X7.    

Audio player that supports native DSD (Calyx M & AK240) Common point is adopted ZMOS chip And enables the native DSD playback via this chip. Announces AK100II · AK120II It does not support native DSD playback unfortunately. Because it has not adopted a ZMOS chip. Fiio X7 hope that it...

Thanks! Brannan      I'm really looking forward to it.   KEISER comes to Japan！  

Add the replay gain. Volume unification is very convenient.

The ES9018 single and powerful power supply unit's welcome. 

As James says. ↓ Under current technology, a player's sound quality is proportional to its power consumption.   Know The ARM1？（It is an audio player of Acoustic Research.） Play time is 4 hours.（It is very short.） But, the sound quality is so great audio player.   That's why battery...

It is ideal for a replacement battery. (Galaxy phone) The reason ↓ Samsung phone use around the world. The battery is spread all over the world.   It is most suitable for the preliminary battery of digital audio players.

Replaceable battery is convenient.

It is 2 and 3. It is want power. It is important also to suppress the distortion. I consume much power. Play time is reduced. This problem can be solved if the battery replaceable.   The use of an external amplifier LINE OUT. I will solve the problem of the driving force. LINE OUT that...

Polycarbonate It is a good choice. I think that it is not a compromise. Metal is cool. But wounds heavy stick. Cost is also high. Polycarbonate is strong and light. Cost is low, too. But care must be taken to the internal heat generation. People use case is to block the wound due to...

phone Out Discrete amplifier section & ESS Chip(Dual) Priority 1. The sound quality 2. Thickness