Modding the PS Audio Directstream DAC MK1 and MK2

I would like to continue discussing all the mods we have created for these two DAC's as it seems PS Audio is no longer allowing discussions about them on their forum.

For reference here is a link to the closed discussion.


Spent a day revisiting the Snowmass 3.0.5 firmware in my Vocm APS xformer modded MK1. In my system, in my acoustic environment, and my ears I prefer Sunlight. Just my experience, YMMV.  

"This job is way better then you did for some poor lad."


I did not mention your name here however Since you just told on yourself...

You assumed we did this for a customer. We did not.

You seem to assume a lot I see as Ted Smith has called you out several times for not knowing what you are talking about and wrongly assuming circuits and design. This is going to get you in trouble for sure not including defamation and libel.

You did this mess not long ago after we installed your transformers.

That old photo you posted shows our 1st test of concept of the Vocm mod done at the very start of this type of mod. We had these caps on hand to test in my personal unit.

After we proved it worked quite well we moved forward to do it correctly with the SMD caps.

This is how we do it.


Thanks George for the support. Yes, this is a complicated design with sandwich using different types of capacitors to cover wider frequency range. The electrolytic capacitors here literally have no legs at all so no parasitic inductance added. 

And support eliminates microphonics. 



Also, my audiophile friend and I (both with APS and full list of modifications)  prefer Windom over all versions of Snowmass FW. 

Windom sounds like multibit DAC, Snowmass is like a good delta-sigma.

I don't have an inferiority complex, and I easily admit when I was wrong.


Ted Smith has called me out for not knowing what I was talking about and wrongly assuming circuits and design AS MANY TIMES as he called you out [or any other (proactive) modder] on the PS Audio forum. It's a trial and error method.

And it doesn't make me wrong in the design of my Vocm mod.

Post removed