I feel like the R6 is a great device that was launched at the PERFECT TIME. I don't know if you even own the device or not yet, but I disagree with 3 of your so called fixes. Headphone impedance doesn't seem to be much of an issue for MANY of the headphones tested by users here. Certainly no more than other DAPs, which is amazing, considering the high OI. Line out noise - I'm not using, so I wouldn't know. Noise with the WIFI on - No such issues on my end at all. There are others who are NOT having issues, as well. SD card slot - no issues! I even double checked today just to make sure and you know what? I had to click on the main drive (C) to get to the R6. It doesn't show up as a separate drive like other devices when connected. I changed the USB designation on the player, and both player drives showed up immediately. I was able to transfer music. The file transfer is very fast, by the way. So, I'm in the EXCELLENT LAUNCH camp. This device is everything advertised and more. I'm amazed at how my 16 ohm IEM's show no effect of the high impedance after minor MSEB adjustments. Excellent work, HIBY!