Currently, sales of “loudspeakers” used in audio equipment are 10% lower each year.... Do you use the radio? Because smartphones are so popular, I think that there are few people who use the radio every day. However, the radio was the original information tool, and the mobile information experience began with the radio. A frequency is assigned to a channel and a radio user tunes, amplifies and synthesizes that frequency Now, the demand for loudspeakers installed indoors has clearly decreased In fact, the Internet is a music market . audio equipment radio smartphones input CD waves streaming output loudspeakers speakers Bluetooth promotion obtaining hardware for free for free sales decreased few people use popular size installed indoors portable wearable A frequency is assigned to a channel and a radio user tunes, amplifies and synthesizes that frequency I love the radio too. Radio broadcasting is an informa...