Electrical and electronic apparatus and instruments for use in connection with recording,[transmission,] reproduction,[ reception and] amplification of sound [or images,], namely, loudspeakers, [stereo and multi channel tuners,] amplifiers, analogue and digital converters, [DVD and] CD players [and recorders, surround sound decoders,] microphones [and sound mixers,] and replacement parts therefor and accessories not included in other classes for the aforementioned goods, namely, headphones, subwoofers, [antennas,] converters, infrared [and radio frequency] remote controls for [loudspeakers, stereo and multi channel tuners], amplifiers, analogue and digital converters,[ DVD and] CD players and [recorders,surround sound decoders,] microphones [and sound mixers; computer] and digital signal processing (DSP) hardware and computer software for use in connection with recording,[ transmission,] reproduction,[ reception, ]correction and amplification of sound [or images], namely, loudspeakers, [stereo tuners,] amplifiers, analogue and digital converters, [DVD and] CP players[ and recorders,] microphones[ and sound mixers]; electrical and electronic apparatus and instruments for correction of sound, namely, apparatus and instruments which correct the interplay between loudspeaker and the surroundings with a view to optimizing the sound quality