This level of machine is suitable for general music appreciation. There is no need to use additional headphones, just use the original ones. Personally, I choose the Philips model, which has a fuller sound and better taste.

If you like heavy bass, it is recommended to use Sony. Philips has better mid-range but limited extension at both ends.

MP3 audio capabilities at this level or even higher levels are relatively limited, and general formats are sufficient.