9 Audio processing and music performance equipment and accessories therefor, namely amplifiers, pre-amplifiers, electronic switchers for audio signals, matrix switchers for audio signals, direct boxes, signal splitters for electronic apparatus, audio interfaces, audio mixers, audio isolators, audio selectors, audio line drivers, audio re-amplifiers, audio impedance and level matching interface box, audio selectors, audio phase adjusters, audio signal boosters, audio signal processors, voltage surge suppressors, power line conditioners, audio load boxes, audio amplifier simulators, electronic effect pedals for use with sound amplifiers and musical instruments, stomp boxes for use with sound amplifiers and musical instruments, audio signal buffers, audio signal translators, power supplies, foot switch controllers, remote controls for audio equipment, flange adaptors, rackmount adaptors, rack screws, thumbset screws, panel covers for audio equipment, power racks for audio equipment; electrical devices for audio engineering and recording, namely, amplifiers, pre-amplifiers, electronic switchers for audio signals, matrix switchers for audio signals, direct boxes, signal splitters for electronic apparatus, audio interfaces, audio mixers, audio isolators, audio selectors, audio line drivers, audio re-amplifiers, audio impedance and level matching interface box, audio selectors, audio phase adjusters, audio signal boosters, audio signal processors, voltage surge suppressors, power line conditioners, audio load boxes, audio amplifier simulators, electronic effect pedals for use with sound amplifiers and musical instruments, stomp boxes for use with sound amplifiers and musical instruments, audio signal buffers, audio signal translators, power supplies, foot switch controllers, remote controls for audio equipment, flange adaptors, rackmount adaptors, rack screws, thumbset screws, panel covers for audio equipment, power racks for audio equipment; and instruction manuals for each of the foregoing goods, sold therewith as a unit