Alto Music- Why you need the Audio Technica ATH-M40X Closed Back Dynamic Monitor Headphones Collapsible design with 90° swiveling Earcups Comes with 2 interchangeable cables and protective pouch. Tuned flat for incredibly accurate sound monitoring across the entire frequency range 40 mm drivers with rare earth magnets and copper-clad aluminum wire voice coilsThe Audio Technica ATH-M40X Closed Back Dynamic Monitor Headphones are closed back dynamic headphones that are perfect for studio monitoring or just for listening to music. The collapsible design allows you to store them easier than those other, bulkier headphones. The ATH-M40X also comes with two interchangeable cables: 1.2m-3m coiled and 3m straight cables with gold connectors so you don't have to choose one or the other. The ATH-M40X's are sleek, compact and give amazing sound quality. What more can you ask for in a headphone?