Originally designed for use with RHA’s CL2 Planar in-ear headphone, the Ag4x cable is compatible with any in-ear headphone housings that use the MMCX connection standard. The cable is fully balanced, eliminating any risk of distortion or crosstalk; and terminates in a 4-pole 2.5mm connection compatible with leading digital audio players and other high-end audio equipment. Reinforced over-ear hooks can be moulded to the exact contours of the ear, resulting in a more secure and comfortable fit.