Audio-Technica ATH-M70x Professional Monitor Headphones (Open Box) used 16-step user selectable

16-step user selectable

so hang on to that original part

Impedance:    50 ohm

and the other has a 4

Audio-Technica ATH-M70x Professional Monitor Headphones (Open Box) used 16-step user selectableThe most advanced in the critically acclaimed M Series line, the Audio Technica ATH M70x Professional Monitor Headphones feature proprietary 45 mm large aperture drivers and are tuned to accurately reproduce extreme low and high frequencies (5 to 40,000 Hz) while maintaining perfect balance. They are ideal for studio mixing and tracking, FOH, DJing, mastering, post production, audio forensics and personal listening. Crafted for lasting durability with