Also termed a moving-coil speaker. The moving diaphragm is attached to a coil, which is conductively connected to the source of electric energy and placed in a constant magnetic field. The current through the coil interacts with the magnetic field, causing the coil and diaphragm to move back and forth in accordance with the current variations through the coil.
"Dear Mr. Coban, I wanted to send a note of thanks to you and your organization for being able to produce a quality product of musical memories from four (4) 78s, of which there was only one record produced of each! Having exhausted all other avenues of producing the CD on my own, I was fortunate to discover your website on the Internet. Thanks ..."