via this auction
![](https://2.bp.blogspot.com/-5NwQnP4ygk4/XEysGMd-m5I/AAAAAAAMJXY/_G33iKKK8-U_48pr484ytQusIqjIGCj_wCLcBGAs/s640/2.jpg)
for the more technically minded, the power supply was upgraded (see toroidal photo), all presets replaced, and very high precision resistors used in DAC circuit. There is probably more to this mod but thats all I could work out from James Walker(Synth Repair Services).
I have been told that this was one of the earlier Prophet 5 rev 2's as it has a smooth panel surface, I have not been able to verify this. If anyone out there is more knowledgeable on the different rev2's it would be great if they could let me know if this is true or not."