The sound box is a metal, round casing that utilizes thin membranes made of mica or metal, which vibrate as a result of the needle’s movement in the record grooves, producing sound.
The Limit FM sound box was introduced to the British market in the 1920s and 1930s by the company of the same name. Specializing in gramophone accessories and spare parts, the company enjoyed great success with its products. Some models boasted elegant and intricate designs, making them not only functional but also aesthetically appealing components of a gramophone.