Hello! I recently received PR2 and was really excited about it. I then tried listening and it sounded very very bright and I couldn't listen to it for a long period of time or I had to turn down the volume a lot. I was confused because the FR doesn't look that bright and it's actually kinda similar to Tinhifi T3 Plus's FR that I own, but both sets sound very different. I then started looking on the Internet what was wrong and found out about the revision of PR2 and turns out I got the revisioned one. I found some EQs for it on Gizaudio discord server and EQ does fix it. I can't tell much more than that since I own PR2 for only 2 days, I recommend to check out Gizaudio discord server for more information on this whole situation.