5. What is the tuning style of the FA7S? What is the sound difference compared to the FA7?

The FA7S tuning style is balanced, with strong sound reproduction, high resolution, good treble extension, fine and transparent. Its bass is moderate with high-density. The FA7S can cope with most styles.
Compared with FA7, FA7S has upgraded the Balanced Armature configuration, its resolution is stronger, the vocal is more poisonous, and the overall sound is more transparent.