Electrical and electronic apparatus and instruments, namely, amplifiers, digital amplifiers, digital signal processors, drivers and transducers all for use in connection with the recordal and reproduction of sound and the transmission and reception of radio signals; sound recording and playback apparatus and equipment, namely, amplifiers and digital amplifiers, stereo, multi-channel, and surround-sound amplifiers and digital amplifiers, digital signal processors, drivers and transducers; sound broadcasting devices, namely loudspeakers, array of loudspeakers, public announcement and cinema sound systems, noise cancellation systems, microphones and headphones; radio transmitters and receivers, modulators and demodulators, signal processors, packaged semiconductor devices and semiconductor chips; sensors, actuators and transducers used for electro-mechanical conversion, ceramic sensors, actuators and transducers used for electro-mechanical conversion, piezoelectric sensors, actuators and transducers, sensors, actuators and transducers for actuating camera lenses and diaphragms; controlled volume pumps, valves, chargers, drivers, positioning systems