I have been rather busy over the last few weeks and so have neglected popping in here to have a browse.I would not be surprised if there has been several incremental changes over time with the K50 as various supply chain parts issues proved challenging. That could very well continue to play out for the near future as well. I would expect Antipodes has a database of what specifically was installed by serial number or serial number series, but very doubtful Antipodes would be open to sharing that info. I would not blame them for being reticent on this. They very well could be flooded with requests from owners wanting to know and requests to upgrade to the latest. With global uncertainties, the latest may not remain the latest either. Antipodes still needs to concentrate on availability for new unit sales and current K50 line is a very fine piece, regardless of possible internal parts variations. I agree with kennyb123 that eventually there will be a new model and an upgrade path to it, though upgrade path may not involve all variations in parts.
As has been noted above, the former information on Antipodes website regarding changes to the builds due to parts availability is no longer there. I applauded the transparency, but most probably resulted in surges of communication requests to them and dealers on this. It has to be tricky for manufactures on this. Eventually users will share pictures of the internals of their units, and earlier owners will respond that their units look different. Inherently, we all want the latest and greatest. Initially, I too wondered on this and experienced a level of FOMO. Sound production quality is really what is important, and the K50 is quite good on this.
I am curious about software advances Antipodes will be developing for their platforms. Again to preclude being inundated with requests for more info, including specifics on when, I think probable info from Antipodes will be pretty close to actual release date(s) in this area.
For various reasons too superficial to name I actually sold my original version K50 and bought one of the current ones. Whilst the changes may have been prompted by supply chain issues the differences between the two versions are widespread. It starts with the case and internal layout which is all new. As far as I can see no part of the original K50 case has been retained. In addition the processor heatsink and cooling fins have been relocated from the side to a position between the transformers and the pcb boards. Then there is an all new internal lid which covers everything and also houses the SSD mounts. The external case top sits above this internal lid.
Probably as a by product of the changes necessitated by the supply issues the K50 now gets extra outlets including an optical out which it did not have before.
As to FOMO with regard to the sound quality of the new version or of the optical etc outputs I can reassure owners that they are both very fine sounding devices. I have tried the new optical output and then not used it again. The USB and BNC outputs as per the original line up and the new one are much better to my ear. Does the new version sound better? Some have told me they think it does but having had the original one for a year and the new one for a couple of months I am not so sure. I am happy to have the new version but if someone offered me to go back to my old one and give me the £2,500 price difference in my back pocket I would probably take the money and the old K50. Like I said they are both very fine devices. I suspect that if Antipodes really thought the new version was better they would have renamed it the K51.