480W toroidal transformer especially designed for the AAcento, no global feedback connection neither in power amplifier nor in the preamplifier, digital volume control doesn’t make use of operational amplifiers Relay input selector circuits to minimize non linearities, SMD oversized resistors to minimize thermal induced distortion, MM/MC Phono input with switchable subsonic filter, class A zero feedback Headphone Amplifier on board, native differential input, Direct Mode to use the integrated amplifier as a power amplifier in a home theater system, microcontroller based equipment management, balance control, four different selectable volume scales