For sale is my Acoustune HS2000mx Sho that comes with the limited discontinued Act 02 chamber instead of Act 01. These are incredible sounding single dynamic driver iems, the best I've heard so far from a single dynamic for timbre, vocal and staging. The chambers are interchangeable for different sound signatures. The reason I am selling is because I have another set in red that I am keeping in my collection instead. Shipping is included CONUS. Thanks for looking.