Fully balanced double Mono Tube Design Ultralinear and Quiet No global feedback Very high input impedance Very low output impedance Pure Class A operation High Quality relais for input selection Low ESR capacitors Upgradeable with external powersupply Regulated well filtered anode voltage Selected 6922 tubes Motor driven blue alps high end potentiometer 2 XLR & 4 RCA inputs 1 XLR & 1 RCA variable outputs 1x RCA record output Classy and elegant dip switches Antimicrophonic mechanical construction. Superlative rigid and heavy luxury alu cabinet. IR remote control