An apparatus includes first and second electroacoustic output transducers, first and second cables each including conductors electrically coupled to inputs of the corresponding first and second electroacoustic output transducers, a third cable including conductors, and a joint housing. The conductors of the third cable are electrically coupled to corresponding conductors of the first and second cables inside the joint housing. Each of the first, second, and third cables is physically retained to the joint housing. The first and second cables exit the joint housing at a distance of at least 10 mm apart from each other.