Audiolab M-EAR 4D

The M-EAR 4D is a three-way design sporting four drive units – one for high frequencies, another for midrange and two for bass.

Both M-EAR models incorporate balanced armature drivers, which differ from the dynamic drivers found in most headphones and earphones. These drivers use an electronic signal to vibrate a tiny reed suspended between two magnets; this movement is transferred to an aluminium diaphragm that generates soundwaves. Balanced armature drivers deliver greater efficiency and are extremely compact, enabling several drivers to be combined in small, sound-isolating in-ear monitors.