We have some minor changes on the 2nd batch DX100. So, we decided to recall
the 1st batch DX100, and upgrade it to same as the 2nd batch.
The 2nd batch DX100 has the following changes when comparing to the 1st
1, better sound quality, as we made some minor changs on the hardware. Of
course, the DAC chip and the OPAMPs are not changed.
2, better Wifi signal, as we changes the internal antenna.
3, using the newest firmware, that will support gapless and AIFF.