Audio equipment; Electronic audio effects apparatus; Electronic audio apparatus; Covers for headphones; Ear pads for headphones; Headphone consoles; Headphone-microphone combinations; Headphones; Headphones for audio apparatus; Headphones for microphones; Stereo headphones; Stereo headphones for personal entertainment use; Stereophonic apparatus incorporating headphones for personal use; Stereophonic headphones; Two-way plugs for headphones; Earphones (other than hearing aids for the deaf); Earphones for radios; Earphones for recording apparatus