I did get in the burson discrete opamps, only thing is the casing those opamps are a lot bigger.
Burson discrete opamps wooow i was realy shocked about the difference i now hear.
Loads of more air around the speakers lots of detail never heared came out of the opa2604
Depth is amazing dito weightness i now hear tiny details far behind the speaker set.
As if you listen to a 750-1000 euro price tag DAC.
This mod stays 
Full article here: http://www.head-fi.org/t/562251/has-anyone-heard-the-xiangsheng-dac-02a#post_7842040
