I´m not good to write something about audio stuffs and to write in english but i hope that my experience helps somebody. For health problems with my ears, i sold all my headphone stuffs. in my headphone experience history, i had some good amplifiers like Little-Dot MKVI and a unique and massive balanced beta-22. I had some headphones like Grado HP-2, Sennheiser HD-800, AKG K-1000, Beyerdynamic T1, Ultrasone Edition 10, Audeze LCD-2, Hifiman He-500 and He-6, etc. etc. etc. And i tried the famous Stax 009 Why the RHA 750i? In first place, to use...