9. What is the sound tuning style of the FH9? What type of music is it suitable for? What are the differences between FD7, FH7 and FH9?

The FH9 is designed with 3 interchangeable sound filters with the sound slightly adjustable. The tuning style of the FH9 focuses on balances with high resolution and gentle treble. While the mids are clean with high-density vocals. The most attractive part is the bass, robust and extended with large dynamics, making for a grand sound stage and engrossing music performance. However, the superior bass keeps great balance with mids and treble instead of covering them up. Therefore, we can say the FH9 is an omnipotent candidate, which is able to handle pop, rock music and different instruments, esp. classical music with large dynamics.