The Pro iCAN is as a top-of-the-line, headphone amplifier that drives anything and everything – from CIEMs through to the most difficult to drive headphone ever made, the AKG K-1000.. Gain is adjustable from 0dB/9dB/18dB. The Pro iCAN can output more than 10V in Single-Ended mode and 20V in Balanced-mode. The 20V mode is equivalent 100W into a 40 Ohm speaker.