Some are required to be returned to PS Audio for bad solder joints or use of prototype parts instead of the intended part that was not available at the time of assembly. Almost all have issues with the small grounding tabs next to each input. They hit the plastic surround around the i2s inputs keeping the tabs from touching the chassis. Also, some were not even masked properly on the chassis. Some tabs were missing altogether as they broke off from being forced (bent) to the side at the factory to try and correct this misalignment. These should go back for repair / replacement of the digital board.
We inspect everything before we make any changes. If we find issues, we don’t feel we can fix properly we will request the unit be returned. If we find these problems, we work with the owner to ship it back to PS Audio before any upgrades are done. This is the major reason we no longer sell DIY transformers for the MK2.
We are currently working on fixing the large DC offset in these units. This will take quite some time as this Vocm is now servo controlled in the MK2.
In the end the MK2 sounds much better with the mods we do. Almost as good as our Limited Edition MK1. We have both so we can have customers listen for themself and also bring in their favorite DAC for comparison.
Hope this answered all your questions.
Modded analog board: Note the new IEC power inlet.
Ground Tab Issue:
