Inductive power supply to reduce any kind of noise from the AC network to the line stage, zero global feedback from input to output, fully differential circuit (differential input and differential output) with discrete components dual-mono configuration, digital volume control without operational amplifiers and with four selectable volume scales, relay input switches to minimize non-linearities, oversized military resistors to minimize thermal distortion, audiograde capacitors made under Airtech specification, microcontroller management, internal wiring and Airtech power supply cable, gold-plated input and output connectors.