Headphone amp adds DAC and Preamp functionality with 3 analog and 2 digital inputs (USB and S/PDIF) plus one set of preamp outs. Audiophile parts from the ground up. Built in a tank enclosure at a fair price. Beat Weiss DAC 2 ( at 1/3 the price) on bass weight and impact (According to 6 Moons). Timbres and images were dense and more saturated. 6 Moons Blue Moon Award. "Headphonics calls it the "final say in headphone amps". Monoandstereo said it was "magic and a music machine for music lovers. It has a remarkable analog-like character that reminds of the best qualities of natural music and vinyl reproduction.