Hi PowderLegend nice review. need to ask you is X2 good enough with the PC only WITHOUT any AMP/DAC and just Realtek ALC1150 on board sound until I manage some money in the future for external AMP/DAC if it is required? thanks  

No external amp required for these cans, though I prefer them amped. At 32 ohms and 100db/1mW sensitivity, these are extremely easy to drive. They'll scale well if/when your budget supports a separate amp and/or dac.