I have tried the MK2.9 modded and the 007MK1. I think the MK2.9 Bluetac is pretty close to the MK1.

I've spent some time with the SRX-9000, SR-009, and Shure KSE1200 (I haven't tried the ES1-A yet). The Stax SR-007MK1 is still the best. Yes, those have better technical performance, but they sound fake in my opinion. The SR-007MK1 obviously has some coloration, but I like it the best among...

Should I change the ear tips for the better quality of sound? If any could recommend me the tips, would be appreciated 👍

Which DAC is better than the original KSE 1500?

Can't wait for a more detailed impression :)

I have been trying to find specific information about the Stax SR007, SR009, and SR Omega headphones, x9000, particularly in regards to their electrostatic driver size. Has anyone here come across this information, or does anyone have an educated guess on this matter?

Interesting, If could pick one, which one will be

ES1-A vs Perun Live vs Stax Sr-009 https://www.bilibili.com/video/BV1zz411z7TN

Looking good! Thanks for the update

I'm considering this vs shure kse1500 as a travel headset.

Very interesting topic, dig this a bit for new Infos that may come across!!!!

Another consider is MDR-R10 or ESR10

After hearing these videos, it seems to be the headphone I'm looking for. Thank you @doyouknowSBmean

ES-R10 vs O2-MK1 Please :D

Thank you, The previous o2-mk2 modded, would you put this one in the natural category? I sold the 009 since the sound was too thin. Maybe will get ES-1A to complement my O2.