Digital and/or analog devices or systems for recording, storage, archive, manipulation, reproduction or playback of sound or images, namely, Hard disk recorders, solid state memory recorders, USB and IEEE 1394 flash drives,namely, hard disk recorders and disk players, utilizing fixed hard disks or removable magnetic or optical disks, routing switchers, remote control apparatus, data compressors, data transmitters and receivers, format converters from and to analog and digital audio and video signals, set top, desktop and portable digital to analog converters, analog to digital converters, power filters, power conditioners, power connector systems, namely, line conditioners, distribution amplifiers for audio and video signals; matrix switchers for analog and digital audio and video signals. wired and wireless transmitters and receivers for audio and video signals for transmission over copper and optical cables, power wire and cable, power distribution, digital and analog signal processors, equalizers, transducers including microphones, microphone pre-amplifiers, switchers, receivers, phono level microphone level interconnecting wire and cables, video signal interconnecting wire and cable, receivers, headphone level wire and cable, headphones; set top, desktop, portable and handheld digital electronic devices for recording, organizing, transmitting, manipulating, and reviewing text, data, audio and video files; electronic docking stations; stands specially designed for holding portable and handheld digital electronic devices; battery chargers; battery packs; electrical connectors, wires, cables, and adaptors; wired and wireless remote controls for portable and handheld digital electronic devices; headphones and earphones; headphone reproduction devices