Vinnie Rossi had been secretive about the particular DAC chip. The name/label is scratched off. I've had numerous NOS DAC that used Philips TDA 1543 & TDA 1541, namely Peter Daniels, Scott NIxon, Ach!, Promethius. Also I have a Mojo Audio Mystique which uses Analog Devices AD1862. And to me the Red Wine Audio sounds more like the Mystique than the other mentioned. The RWA, using a tube buffer in the output, colors the sound depending very much on the particular tube. The tube liquidity and roundness is evident even though my SET tube amp, how much more so into a solid state amp.