... and Single End NEW iBasso PB2 Pelican Portable Balanced Headphone Amplifier Main features: - 32V voltage swing, the highest voltage swing among ... OPA604*4, AD797*4, BUF634U*4(Stackable), BUF634P*4(Hi-C), Dummy adapter*4, AC adapter, leather pouch, 3.5 to ... , and warranty card NEW iBasso PB2 Pelican Portable Balanced Headphone Amplifier headphone amplifier