Alexander Graham Bell patented his first electric loudspeaker (capable of reproducing intelligible speech) as part of his telephone in 1876, which was followed in 1877 by an improved version from Ernst Siemens.

Who invented the first loudspeaker and when?

The First Loudspeakers

In 1877, Ernst Siemens released a more advanced version of an electric loudspeaker after Alexander Graham Bell, inventor of the telephone, had patented a similar invention in 1876.

Who invented the sound system?

Throughout the 1870s and 80s, various loudspeaker-like devices existed, most notably on Alexander Graham Bell's telephone (1876) and Edison's phonograph (1877), but the true moving coil loudspeaker, the forebear of all loudspeakers since, was invented by Oliver Lodge in 1898.