Details on the DAC mod...from one of Steve's 16 emails in 10 days with me. Can you believe that...all or most of his own volition; I tried not to bother the guy - I knew it was in the hands of an expert. Such great customer service!
It took me a lot longer than expected to do the DAC, but it is really smok-in now...
Two of the three large caps screwed to the chassis and soldered to the edge of the board had actually come loose - they
are soldered good now. This design had a number of flaws, including:
1) lousy power decoupling for the output driver op-amps
2) stupid use of resistors to the op-amps which severely limited bandwidth
3) very long traces on the board for transmitting the analog signals - really creates a lot of sibilance and dielectric
absorption - I replaced these with my perfect crystal silver wire in teflon tubing.
4) poor power delivery to the DAC option board - this has a good harness now and liberal use of Black Gate caps
It's all fairly meaningless to me...I'm no techie. Maybe you can make sense of it. I care only if it sounds pleasant..as indeed it seems.
The mods to the Sony transport are detailed on www.EmpiricalAudio.com
Wolfy, do you ever sleep...cripes man, the property taxes on LI keeping you up all night?