hi, finally my topping a90+d90 mqa arrived, i have a little question,
which one the best setting for using on headphone?
For A90
1. A90: HPA > XLR > H ?
2. i use hd800s with 4.4 balance jack plug, what different between jackplug 4,4 vs xlr plug ?
3. Volume Knob, how much volume should i use on...