The most widely-used type of speaker today is the dynamic speaker, invented in 1925 by Edward W. Kellogg and Chester W. Rice. The dynamic speaker operates on the same basic principle as a dynamic microphone, but in reverse, to produce sound from an electrical signal.
https://en.wikipedia.org/wiki/Loudspeaker
However, he did not use his device for audible transmission, as did Alexander G. Bell who patented the telephone in 1876. After Bell's patent was granted, Siemens applied for German patent No. 2355, filed Dec. 14, 1877, for a nonmagnetic parchment diaphragm as the sound radiator of a moving-coil transducer. The diaphragm could take the form of a cone, with an exponentially flaring morning glory trumpet form.
http://www.aes.org/aeshc/docs/recording.technology.history/loudspeaker.html
A subwoofer is a woofer driver used only for the lowest part of the audio spectrum: typically below 200 Hz for consumer systems, below 100 Hz for professional live sound, and below 80 Hz in THX-approved systems.
https://en.wikipedia.org/wiki/Loudspeaker
1901 - John Stroh first described the conical paper diaphragm that terminated at the rim of the speaker in a section that was flat except for corrugations, filed for the British patent No. 3393 on Feb. 16, 1901, granted Dec. 14, 1901.
http://www.aes.org/aeshc/docs/recording.technology.history/loudspeaker.html
Edison Tech In 1861, Johann Philipp Reis, first developed a simple type of electronic loudspeaker. During his early years he was a teacher at Germany in which he invented the hearing aid that led to his invention of the speakers. He was able to reproduce the sounds from the electrical transmission. Alexander Graham Bell. Edison Tech Alexander Graham Bell was the second to create the first ever speaker. He was trying to get some ideas off of Reis's work. Werner Von Siemens. Edison Tech Werner Von Siemens first used the idea of using an electromagnetic coil to transport signals of the DC transients and also adding telegraphic signals.
http://www.timetoast.com/timelines/evolution-of-speakers--2
The First Speakers Sold. Edison Tech The Speakers were sold for $250 which is about $3000 for the US today. The speakers were made under the company called RCA (Radio Corporation of America). Many were sold across the nation about 3 years after the product was ever created.
http://www.timetoast.com/timelines/evolution-of-speakers--2
Oskar Heil invented the air motion transducer in the 1960s. In this approach, a pleated diaphragm is mounted in a magnetic field and forced to close and open under control of a music signal. Air is forced from between the pleats in accordance with the imposed signal, generating sound.
https://en.wikipedia.org/wiki/Loudspeaker
1911 - Edwin S. Pridham and Peter L. Jensen in Napa, California, invented a moving-coil loudspeaker they called the Magnavox that was used by Woodrow Wilson in San Diego in 1919.
http://www.aes.org/aeshc/docs/recording.technology.history/loudspeaker.html
The first experimental moving-coil (also called dynamic) loudspeaker was invented by Oliver Lodge in 1898. The first practical moving-coil loudspeakers were manufactured by Danish engineer Peter L. Jensen and Edwin Pridham, in Napa, California.
https://en.wikipedia.org/wiki/Loudspeaker
A loudspeaker (or loud-speaker or speaker) is an electroacoustic transducer; a device which converts an electrical audio signal into a corresponding sound.
https://en.wikipedia.org/wiki/Loudspeaker
who invented the speakers
Johann Philipp Reis invented the speakers. Johann Philipp Reis has invented the speakers.