With their bass-enhanced frequency response, these premium professional studiophones are ideal for use with drums, bass and other low-frequency sound sources. Superior components provide very high SPL capabilities while maintaining exceptional clarity of sound. Exterior design features include sturdy strain-relief cable and comfortable circumaural earpieces that can be rotated 180º to permit one-ear monitoring. The studiophones utilize 40-millimeter drives with neodymium magnets and copper-clad aluminum wire voice coils for lowest mass. The ATH-D40fs is equipped with an 11-foot cable terminated in a standard ¼-inch connector. This field-serviceable model allows elements, cables, and earpads to be replaced in the field if needed.