Apparatus for the transmission of sound and image; sound and picture recording apparatus; radio receivers and transmitters; apparatus for wireless transmission of acoustic information; loudspeakers; audio speakers for automobiles; audio equipment for vehicles, namely loudspeakers for automotive systems, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; car audio apparatus, namely, stereos, speakers, amplifiers, equalizers, crossovers and speaker housings; audio equipment for recording studios, namely, stereos, speakers, amplifiers, equalizers, crossovers and audio recorders; pairable wireless speakers; speaker enclosures; software to control and improve audio equipment sound quality; audio amplifiers; integrated audio amplifiers; multi-room audio devices, namely stereos, speakers, amplifiers, equalizers, crossovers, speaker housings and surround sound systems; record players; portable radios; portable media players; personal headphones for sound transmitting apparatuses; music headphones; personal stereos; speakers for portable media players; acoustic conduits; sound recorders; audio receivers; apparatus for the reproduction of sound; audio amplifiers; audio electronic apparatus, namely digital devices for recording, organizing, transmitting and reviewing audio files; audio processing apparatus, namely equalizers, limiters, compressors; digital sound processors; high fidelity audio apparatus, namely stereos, speakers, amplifiers, equalizers, crossovers, speaker housings, digital devices for recording, organizing, transmitting and reviewing audio files