Hi. I’m interested in doing the transformer mod, too. I ordered the XS4400’s some weeks ago, also from Don Audio (I’m also based in Germany), but haven’t received them yet.
As I’m not used to soldering at this level, I’m looking into hiring a local tech to perform the swap. In oder to brief that person, I prepared a short document with relevant information from this thread. This includes the link to the manufacturer/products, the specs, all relevant quotes from @tedsmith about this mod (and there are plenty! ) and some more quotes from forum members about the difficulties of performing the mod. I also included some shared photos from the DSD inside before, during and after the mod (and plan to replace these with new ones from the swap of my DSD).
And then I was thinking, “this document might be useful for others”, if they need to brief someone about “what to do”. But - none of this content was produced by myself.
I’m very aware that this “collection” is OK to do for yourself, but it’s nothing that should be shared - without the permission by the people who produced that content.
So - first, here’s a look at this document. If you see something that you do not want to be in there, please let me know.
I’d like to offer to share the PDF via PM. I hope it’s OK to do something like this. Please let me know, if not.