40 Assembly of products for others; custom and contract manufacturing in the fields of audio equipment and apparatus, audio systems, sound systems, acoustic equipment, transducers, loudspeakers, telecommunication, audio and compression drivers, consumer electronics, cabinets for audio equipment, headphones and earphones; manufacturing services for others in the fields of audio equipment and apparatus, audio systems, sound systems, acoustic equipment, transducers, loudspeakers, telecommunication, audio and compression drivers, consumer electronics, cabinets for audio equipment, headphones and earphones; research in the field of manufacturing processes; technical support services, namely, providing technical advice related to the manufacture of audio equipment and apparatus, audio systems, sound systems, acoustic equipment, transducers, loudspeakers, telecommunication, audio and compression drivers, consumer electronics, cabinets for audio equipment, headphones and earphones; metal plating and laminating; soldering; welding; woodworking; electroplating