Denafrips FPGA Firmware Update

@liangx5  It was very interesting reading your results with' the iris and t+.  I recently read a review by another iris/t+ owner that had a different outcome.  I don't remember which update he did but after the update he sold his iris and went back to usb direct saying that sq was better using usb without the iris. I'm about to buy a t+ and will be going from an Aurender streamer via usb directly to the t+  i'm going to try to find the review i mention to see what version update was used and for that matter that I didn't misunderstand what he said to begin with.  I guess like the old saying goes, ymmv:-).

@marco1 Was that also Iris DDC 12th? The version of DDC could make a difference, I think, since the new 12th has some improvements e.g. power supply, new FPGA chip, etc. I could not compare the two DDCs since the old one is not compatible with my T+ after updating to firmware V3.7. I also remember hearing improvements over USB direct when I first installed the old Iris DDC 2 years ago, that time my T+ was running on V1.0 fpga firmware. BTW, I have clock sync set up so the DDC is using T+'s OCXO clock instead its internal TCXO clock. 

@liangx5  Can't answer that.  Still trying to find what I read 🤔

Found it!  He did not have the 12th version of the iris or T+.  So the upshot sounds like pre 12th versions the units were not compatible.  So Denafrips re-engineered and now they are.  Well that’s progress for you.

Seems like things are stabilizing now which is great in terms of the latest firmware updates across the models.

For those with Terminator Plus and have done the update, how do you like it with some more listening time?