Acoustic apparatus for recording sound. Acoustic apparatus for reproducing sound. Acoustic conduits. Acoustic control circuits. Acoustic couplers. Acoustic devices. Acoustic discs. Acoustic instruments. Acoustic recording supports. Acoustical diffusers. Active cable assemblies. Active cable connectors. Alternating current power apparatus. Amplification apparatus. Amplification instruments. Amplifier tuners. Amplifiers. Amplifiers being audio apparatus. Amplifiers for transducers. Amplifiers for use in cars for entertainment purposes. Amplifiers for use with gramophones. Amplifying apparatus. Amplifying tubes. Amplifying valves. Analog master modules. Analog output modules. Analog recording apparatus. Analog slave modules. Analogue circuits. Analogue control apparatus. Analogue convertors. Analogue displays. Analogue precision potentiometers. Analogue sound modifiers. Analogue to digital audio converters. Analogue to digital converters. Analogue to digital data converters. Anti-noise apparatus for noise suppression. Anti-noise filters. Apparatus for amplifying sound. Apparatus for carrying sound. Apparatus for connecting electrical circuit components. Apparatus for connecting electrics. Apparatus for connecting electronics. Apparatus for controlling the supply of electrical current. Apparatus for creating digital effects. Apparatus for decoding encoded signals. Apparatus for decoding magnetically recorded information. Apparatus for digital signal processing. Apparatus for electrical signal transmission. Apparatus for electronic digital processing. Apparatus for electronic recording of sound. Apparatus for generating noise. Apparatus for filtering*. Apparatus for lighting control. Apparatus for long-distance microphonic monitoring. Apparatus for making sound on discs. Apparatus for making sound on tapes. Apparatus for making sounds*. Apparatus for measuring noise. Apparatus for processing audio signals. Apparatus for processing recorded sound. Apparatus for producing analogue for music. Apparatus for producing pre-recorded cartridges. Apparatus for producing pre-recorded magnetic tape cassettes. Apparatus for receiving electromagnetic radiation. Apparatus for recording. Apparatus for recording audio signals. Apparatus for recording sound. Apparatus for reproducing stereophonic sound recorded on discs. Apparatus for reproducing stereophonic sound recorded on magnetic tapes. Apparatus for reproduction of sound. Apparatus for sound level measurement. Apparatus for sound reproduction. Apparatus for sound transmission. Apparatus for taking soundings. Apparatus for the detection of radiation. Apparatus for the recording of sound. Apparatus for the remote control of signals. Apparatus for the reproduction of sound. Apparatus for the transmission of electrical signals. Apparatus for transmitting audio signals. Apparatus for transmitting signals. Audio amplifiers. Audio apparatus. Audio apparatus for vehicles. Audio cable. Audio conference apparatus. Audio conference instruments. Audio electrical apparatus for in-car entertainment. Audio electronic apparatus. Audio electronic instruments. Audio equipment. Audio installations. Audio instruments. Audio mixing apparatus. Audio mixing console apparatus. Audio mixing desks. Audio mixing machines. Audio oscillators. Audio players. Audio processing apparatus. Audio processing apparatus for use with video apparatus. Audio products for use in vehicles. Audio racks adapted for use with audio equipment. Audio recording apparatus. Audio recording instruments. Audio recordings. Audio signal level controlling apparatus. Audio signal processing apparatus. Audio speakers. Audio speakers for automobiles. Audio speakers for home. Audio switching apparatus. Audio transmitter units. Background audio broadcasting apparatus. Broadcast transmitters. Broadcasting apparatus. Cabinets adapted for electrotechnical apparatus. Cabinets adapted for high fidelity apparatus. Cabinets adapted to contain electronic apparatus. Cabinets adapted to contain electronic instruments. Cabinets adapted to hold communications apparatus. Cabinets for loudspeakers. Car audio apparatus. Car audio instruments. Car speaker components. Car speakers. Car stereo apparatus. Car stereo instruments utilising power supply apparatus. Car stereos. Carriers for bearing sound. Cases adapted for electric circuits. Cases adapted for electronic circuits. Cases adapted for electronic components. Cases adapted for electronic equipment. Cases adapted for power supplies. Cases adapted for semiconductors. Casings for electronic devices. Chokes for radio interference suppression. Choking coils. Choking coils [impedance]. Circuit boards. Circuit boards for electrical engineering. Circuit boards for electronic engineering. Coils (choking- ) [impedance]. Coils [electromagnetic]. Coils being electrical apparatus. Coils being electrical instruments. Coils being electronic apparatus. Coils being electronic instruments. Coils for electrical magnets. Coils, electric. Communications cabinets. Components for electric circuits. Components for electrical devices. Components for electrical installations. Components for electronic circuits. Components for overvoltage protection for electrical apparatus. Computer controlled sound apparatus. Computer controlled sound instruments. Computer controlled sound apparatus. Computer controlled sound instruments. Computer controls for lighting apparatus. Control apparatus for audio signals. Control circuits. Control consoles for lighting apparatus. Control consoles for lighting instruments. Converters for analog signals. Converters for digital signals. Couplers (Acoustic- ). Couplers (Electrical- ). Current overload protectors. Current rectifiers. Current shunts. Current transformers. Deflecting coils. Diaphragms [acoustics]. Diaphragms [parts of loudspeaker apparatus]. Digital amplifiers. Digital sound processors. Digital to analogue converters. Digital to analogue data converters. Disturbance waveform analyzers. Dual amplifier balancers. Electric amplifiers [current]. Electric amplifiers [signal]. Electric amplifiers [sound]. Electric apparatus for the transmission of analog signals. Electric apparatus for the transmission of digital signals. Electric apparatus for transmitting sound. Electric circuit boards. Electric circuits. Electric coils. Electric cords for musical amplifiers. Electric cords for musical instruments. Electric couplings. Electric current transformers. Electric rectifiers. Electric transformers. Ferrite magnets. Filters being electrical components. Graphic equalisers. Graphic equalizers. Graphic equalizers for use in vehicles. Guitar amplifiers. Guitar microphones. Hi-fidelity loudspeakers. High fidelity apparatus. High fidelity audio apparatus. High fidelity audio products. High fidelity instruments. High fidelity sound reproducing apparatus. Housings for electrical apparatus. Housings for electrical instruments. Housings for electrical sub-assemblies. Housings for electronic instruments. Housings for electronic sub-assemblies. Hybrid circuits. Hybrid integrated circuits. Illuminated signs. Illuminated signs used for advertising. Impedance transformers. Inductor coils. Inductors [electricity]. Instruments for the recording of sound. Keyboard amplifiers. Leads (Electric- ) for amplifiers. Leads (Electric- ) for audio dubbing. Leads (Electric- ) for electric guitars. Leads (Electric- ) for microphones. Leads (Electric- ) for speakers. Light control apparatus. Light emitting diode displays. Loudness controllers. Loudspeaker apparatus. Loudspeaker boxes. Loudspeaker cabinets. Loudspeaker chassis. Loudspeaker enclosures. Loudspeaker housings. Loudspeaker installations. Loudspeaker stands [adapted for]. Loudspeaker systems. Loudspeaker units. Loudspeakers. Loudspeakers for mounting on walls. Loudspeakers for use in cars. Loudspeakers for use in cinemas. Loudspeakers for use in theatres. Loudspeakers for use in vehicles. Magnetic coils. Megaphones. Microphone mixers. Microphone plugs. Microphones. Microphones for record players. Microphonic pick-ups. Mixing consoles [electric]. Mixing desks [signal]. Mixing desks [sound]. Multichannel sound processors. Noise cancelling apparatus. Noise filters. Noise suppression apparatus. Noise suppressors [electrical components]. Noise suppressors for protecting the coil of contactors. Noise suppressors for protecting the coil of relays. Pick-ups. Pick-ups for electrical musical instruments. Pick-ups for sound amplification. Picks-ups for guitars. Portable sound recording apparatus. Portable sound reproducing apparatus. Power amplifiers for creating effects. Power amplifiers for use in sound reproduction. Power output amplifiers. Preamplifiers. Printed circuit boards. Printed electric circuits. Public address amplifying apparatus. Public address apparatus. Public address installations. Public address instruments. Public address speaker systems. Public address systems. Signal processors. Signal processors for audio speakers. Sound amplifiers. Sound amplifying apparatus. Sound amplifying receivers. Sound carriers. Sound consoles. Sound mixing apparatus. Sound mixing apparatus for recording. Sound mixing apparatus for the broadcasting of theatre sound. Sound mixing apparatus for use in video dubbing. Sound monitoring apparatus. Sound processors. Sound reinforcement apparatus. Sound reproducing apparatus. Sound reproducing apparatus for use in automobiles. Sound reproducing apparatus for use in cars. Sound reproducing apparatus with keyboard. Sound reproducing apparatus with microphone. Sound reproducing instruments. Sound reproduction apparatus. Sound reverberation units. Sound samplers. Sound transmitting apparatus. Speaker switches. Speakers [audio equipment]. Speakers for compact disc players. Speakers for computers. Speakers for record players. Speakers for tape players. Speech communications apparatus for use in noisy environments. Stereo amplifiers. Stereo amplifying apparatus. Stereo apparatus. Stereo hi-fidelity apparatus. Stereophonic amplifiers. Stereophonic apparatus. Stereophonic sound units. Stereos. Synthesised sound apparatus. Transformer units. Transformers [electricity]. Wireless receiving apparatus. Wireless transmission apparatus. Wireless instruments. Wireless transmitters.