OK! All the MODs done except for bypassing AC filter! I do not think there is a need for it!LM4562, UF4007 diodes and all RUBICON ZL capacitorsLM4562Replaced parts
Ahh! Almost a new DAC soundwise! Most impressive thing is improvement of transients. Decay, attack and speed of all frequencies improved. Bass is most impressive. There is oomph nature and punch to bass notes. Expanded sound-stage, Better bass flat frequency response and more details can easily be appreciated. I think improved transients are mostly due to fast diodes and better audio grade capacitors.
Well worth my efforts and I am very happy. Now I should burn it for 50 hours and write up a full review.
Few tips for those trying mods! The solder pads for both diodes and capacitors are very delicate and will come off very easily. I have been able to secure all of them with patience. Please use a good desoldering braid to suck as much as solder when desoldering! I used a very good 8mm braid. Suction is difficult due to the type of solder they used!