A headphone unit having left and right ear piece units and an input cord having two conductors an end of each of which projects into a housing. Within the housing, the input cord is connected to two equipment cords which terminate in a pair of input plugs. Each of the equipment cords has two lines. The input plugs each have portions for receiving left and right audio signals. The lines carrying left audio signals from the two input plugs are connected to the input cord conductor which leads to the left ear piece unit and the lines carrying right audio signals from the two input plugs is connected to the input cord conductor which leads to the right ear piece unit.

A remote control circuit for remotely controlling a power source and a volume of a main set from a stereo-headphone composed of a remote control transmitting circuit arranged in a headphone, and a remote control receiving circuit arranged in a mainset.

A headphone jack extended outlet which amplifies and splits the output signal from a single conventional headphone jack to power multiple headphone jacks. The extended outlet includes a conventional headphone plug that inserts directly into the headphone jack of a sound system and includes multiple headphone jacks for powering multiple headsets. The extended outlet further includes circuitry which amplifies the output signal received from the sound system to a level sufficient to power multiple headsets.

An audio transmission apparatus has a primary speaker and a secondary speaker apparatus. Two primary speakers are provided to correspond with the left channel and the right channel. The secondary speaker apparatus is placed on a first surface of the primary speaker. A switching mechanism, such as a micro switch or a proximity sensor, is disposed between the primary speaker and the secondary speaker apparatus such that removal of the secondary speaker apparatus enables the secondary speaker apparatus and disables the primary speaker. Connected by wire or a wireless medium, the secondary speaker apparatus is an earphone, a head set, or an ear bud, depending on the application. The audio transmission apparatus is used in conjunction with any type of audio output device, such as a television, computer, stereo, and the like.

An audio headphone is disclosed having a pair of earpiece speakers affixed to an adjustable leaf spring such as to allow the headphone to affix to a user's head in such a manner as to align the speakers with the user's ears. The speakers are in electrical communication with a stereo, CD player, MP-3 player, or the like by a communication cable that terminates in a modular interconnection housing. The modular interconnection housing has a male communication connector protruding from one end, and a female communication connector received at the opposite end. The male communication connector is designed to provide electrical communication with the audio signal, and the female communication connector is designed to provide parallel electrical communication with the male communication connector.