9 Amplifiers, loudspeakers, digital signal processors, signal processors, short-range radio controllers for audio equipment, shortrange radio speakers, loudspeaker grills, audio cables, audio adapters in the nature of audio connectors for adapting one type of audio cable plug to another type of audio cable plug, speaker enclosures, subwoofers, subwoofer enclosures, and tweeters; excluding headphones, smartphones, virtual reality headsets, printed circuits, and data processing apparatus