This supply has been made to order for the O2 Headphone Amplifier
Input Voltage: 230V AC 50Hz (EU and UK) 240V AC 50Hz (AU) and 115V 60Hz (US)
Output Voltage: 15V AC
Output Current: 500mA
Idle Voltage: 17,7V AC
Now available in four different versions !
Further details in attached Datasheet