I need help on finding a Dac on the 500 price point that uses Burr Brown chip. Connections S/PDIF prefered...
If you have a computer, the Xonar Essence STX sound card is nice. Bur Brown PCM 1794A a delta sigma chip. Or you can get the Xonar Essence ONE.
You can also check out Audio GD some of their DACs use use the PCM 1704 chip, it is a R/2R resistor ladder dac, probably the best DAC bur brown ever made too bad it is discontinued.