Thanks for your reply Paul.
I agree with you if the DX is connected to a portable device also running on a battery, then it makes sense not to drain the battery of the source.
But if the DX is connected to e.g. a stationary device like a PC consuming the electric power from a wall plug, then it would be great to have the option to charge the DX in DAC mode.
Ideally there would be an option in the DX settings that let the user decide if the DX should be charged in DAC mode or not, what do you think ?
We can't change the settings to do this.
Some PC have a very low output on the USB port. So, if we allow our player to draw a large current from the PC, which it can and does do, it has the possibility to freeze the PC. This has occurred with very upset customers so we had to make a decision about this. One customer had the USB burn out and this is not a good situation. I have asked our software team again about this.
@Paul - iBasso
This is exact the reason why hardware specifications exist.
The USB specification clearly describes the max. current that is allowed for a specific USB type.
As long as the DX220 stays inside the USB specification, there is nothing to worry about.
iBasso is not responsible for poor designed PC mainboards which seriously violates the USB specification.
You could deal with this problem in two ways from my point of view
a) Limiting the max. current that the DX220 drains from an source. Ideally the DX220 would be limited only in DAC mode and drains the full current in regular charging mode.
Of course i don't know if you can limit the current only with a different firmware (software) or if you need a different hardware design to achieve this.
b) You could show a clear warning mask to inform the user that the source must be able to handle the max current the DX220 drains. Ideally there would be a settings switch that a user has to set explicit for charging in DAC mode. Then the warning mask could be shown.
I don't want to be annoying, but i think if the engineers really want, there would be a way how to achieve this in a safe way for everyone. And i also think, that there are other users like me, who would highly appreciate such a charging possibility in DAC mode.
The DX220 is a really outstanding DAP with a brilliant DAC implementation, very well done soundwise. Thank you for this little gem.
It would be a real benefit to be able to use it also as a stationary DAC without to pay attention to the battery status.