The best choice for IEM (In-Ear Monitor) for drummers and stationary musicians. This headphones amp was design with no compromises: sturdy diecast aluminum, reel power supply, a lot of headroom, extra dynamics, powerful and cristal sound.
Because of its low noise and low distorsion, the PH9B will give more pleasure and less hearing fatigue to the musicians who's using headphones for long period of time during performances, sometime 2-3 hours.