Modified one is DAC-60, I think this is the best so far. The chipset it used is 1704 and with tube ( 6922) output. It is an all-around DAC and it is better for both vocal and symphony....
I had also change the diode, power regulation replaced with a high end one, all regulated iC was changed to LTXXX, All resistor on analog circuit had changed to RMG. all resistor on digital circuit change to dale. Yes, it cost more than the DAC itself at least 3 times.