A balanced armature driver assembly comprises a first balanced armature driver having an armature surrounded by a coil, said first balanced armature driver having two taps for connecting respective end points (12,14) of said coil to an input signal circuit. The coil further comprises an intermediate point (16) which is electrically connected to one of said respective end points (12,14) such that the coil is shorted (16) between said intermediate point and said one of said respective points (12,14).