The Accustic Arts tube DAC has dual 32 bit mono DACs for left and right channels, a Class A power supply with 84,000 uF of capacitance, dual encapsulated toroidal transformers, and a heavy gauge solid aluminum chassis. The hand selected tubes are (2) 12AX7WA/ECC83, are lab tested by Accustic Arts and burned in for 100 hours prior to shipping. Balanced and single ended outputs are included, along with XLR, RCA & BNC inputs. Front panel selector switching includes Input 1/Input 2/Input 3/Mute and Tube Standby/Tube On.