Audio and video equipment, namely, preamplifiers, amplifiers, loudspeakers, microphones, audio signal processors, compact disc players, video disc players, headshells for record players, acoustic meters, digital media streaming devices, connecting electrical cables, cable connectors, earphones and headphones; graphical user interface software for use in audio and video applications; power line conditioners; integrated circuits; electronic components for audio equipment in the nature of electronic transistors, capacitors, electrical resistors, and electrical transformers