moving-iron loudspeaker technical
moving-coil loudspeaker technical

Voice coil - a coil used in a moving-coil loudspeaker, suspended between the poles of a magnet.

In 1898, Lodge gained a patent on the moving-coil loudspeaker, utilizing a coil connected to a diaphragm, suspended in a strong magnetic field.

I have rarely heard such stability and depth of image from a moving-coil loudspeaker and these are factors which applied, moreover, across a remarkably wide listening area.

Edwin Pridham and Peter L. Jensen invented the moving-coil loudspeaker in 1915 in their Napa workshop while working on an improvement for the telephone receiver.

The first practical moving-coil loudspeakers were manufactured by Danish engineer Peter L. Jensen and Edwin Pridham in 1915, in Napa, California.

Magnavox was founded in 1917 by Edwin Pridham and Peter L. Jensen, inventor of the moving-coil loudspeaker two years earlier at their lab in Napa, California.