Audio apparatus and Instruments, namely, limiters, compressors, also for sound studios and structurally defined components therefore; apparatus and instruments, namely, digital video recorders; measuring apparatus and instruments, namely, electric apparatus and instruments for electro acoustics and parts therefore, namely, antenna parameter measuring apparatus, derived-unit measuring machines and apparatus, measuring instrumentation and apparatus, namely, digitizers; scientific apparatus and instruments, namely, sensing and signaling devices for electro acoustical purposes for measurement and quality control of electro acoustical apparatus, controlling apparatus and instruments, namely, apparatus for surveying, namely, electric and electronic video surveying installations, teaching apparatus and instruments, namely, apparatus for use in electro acoustics, namely, computers and instructional manuals sold as unit, optical apparatus and Instruments, namely, limiters, compressors; electronic apparatus and instruments, namely, apparatus and instruments for recording audio signals, and parts therefore; apparatus and instruments for recording, transmission and reproduction of sound and image, namely, high frequency sound transmitting apparatus and sound transmitting technology apparatus, transmitting devices, namely, pocket transmitters, namely, radio and telephone transmitters, pocket UHF and VHF transmitters and parts and fittings for the aforesaid goods, namely, aerials, battery packs, accumulator packs, plug-in microphones, minimodule systems, namely, rectifier modules, memory expansion modules, transmitter containers, corkscrew aerials, quick-charging accumulators, power supply units for charging apparatus, automatic charging apparatus, namely, charging appliances for rechargeable equipment, magnetic data carriers, namely, blank magnetic data carriers and pre-recorded magnetic data carriers featuring electro acoustics themes, namely, music and sounds; recording discs, namely, blank CDs and DVDs for sound and video recording and prerecorded CDs and DVDs featuring electro acoustic themes, namely, music and sounds and CDs, namely, blank magnetic CDs and prerecorded CDs featuring electro acoustic themes, namely, music and sound; sound recordings featuring music entertainment; data processing instruments, namely, interface cards for data processing equipment in the form of printed circuit and instructional manuals sold as a unit; computer buffers and personal computers; data carriers containing programs and software on floppy disks, tapes and discs for use in database management, use as a spreadsheet, word processing and software in the field of electro acoustics; computer hardware; computer peripheral apparatus; digital communications hardware and software for electro acoustics; for use In database management, use as a spreadsheet, word processing; sound processing apparatus, namely, sound amplifiers, receivers; sound recording apparatus for use in vehicles, Hi-fi sound equipment, namely, speakers, microphones, headsets and Hi-fi video equipment, namely, television sets; stereo recording apparatus; speaking apparatus and pans; computer sound systems, namely, mixers and computer operating systems; loudspeaker systems; loudspeakers; low frequency loudspeakers; lowest frequency loudspeakers; tweeter loudspeakers; range loudspeakers; loudspeakers for musical instruments; cross-over nets; frequency separating nets for loudspeaker systems, loudspeaker screens, cases, stands and boxes for loudspeakers and Hi-fi equipment; passive antennas for stereo cases; transformers; hi frequency transformers; acoustic lenses for loudspeaker funnels; driver for loudspeakers; stereo amplifiers; radio equipment, namely, radio transmitters, radio receivers; Hi-fi sound apparatus and instruments for cars, namely, car cassette players; signal processing equipment, namely, emergency signal transmitters, digital signal processing equipment, namely, digital signal processors, digital speech signal processors; sound processors; amplifier modules for installation in loudspeaker cases; active frequency dividers; interfaces and analog interfaces, namely, interfaces within electro acoustics; digital transformers for recording of digital audio signals; amplifiers, pre-amplifiers, power amplifiers, receivers, receiving apparatus for sound and image, namely, compact receivers and UHF receivers; tuners for cars and stereos; home video processors; DVD and CD-players; remote control for radios, television, stereos; microphones, headsets for telephones and computers for use in aeroplanes, buses, trains; sound systems comprised of amplifiers, loudspeaker systems and components thereof; television sets; video monitors, home video systems comprised of speakers, video disc players; audio control systems for language-controlled and multimedia purposes consisting of sound mixing apparatus, audio processing equipment, namely, equalizers, antennas, filters, microphones, headsets, headphones; cables, namely, adapter cables, co-axial cables, connection cables, headphone cables, all goods as mentioned herein sold with instructional manuals as a unit