Audeze CRBN Electrostatic Headphones - Open BoxEach Audeze CRBN Open Box is tested, inspected and cleaned to be in like new condition. Breakthrough Electrostatic Technology Featuring the most advanced electrostatic technology in decades, Audeze proudly introduces the CRBN electrostatic headphone (pronounced carbon), which features a new Patent pending polymer film with suspended carbon nanotubes to eliminate problems commonly found in previous electrostatic designs. Originally developed for MRI