The Th610 Stereo Headphones From Fostex Feature A Detachable Cable Connection And Come In A Beautiful Matte-Finish Black Walnut Housing. The Headphones Feature Bio-Dynamic 50Mm Driver Units With A Powerful 1 Tesla (1,000 Gauss) Magnetic Circuit For A Wide Dynamic-Range Reproduction With Low Distortion, Offering Rich Lows, Natural Mid-Range, And Smooth Highs. Founded In 1973, Fostex Is An Acclaimed Manufacturer Of Location Sound, Multi-Track Recording, And Speaker Products.