I am really digging the synergy between the UberFrost and the La Figaro and the Beyers. Incredibly resolving yet a bit warm and slippery from the tubes. One other thing I am enjoying is the way I have the CD player wired to the optical input on the DAC and the RCA outs to the amp through the switch. I can A+B between the Burr Brown in the Yamaha and the UberFrost. Fun.