Before the Second World War, a company called S.E.M. (Super Electro-Mechanic) situated 26, rue Pierre Lagny in Vincennes near Paris started producing a 4.7 inches electro-magnet speaker to be used in radio receptors. This company, held by Mr DORLIAC, ex mechanic engineer onboard warships, was then specialised in high precision metal parts.

In the meantime in the early 30's, Mr LEGORJU created "AUDAX" and started producing speakers in Montreuil.

Little time after war, Mr LIEBERT, production and R&D manager for "S.E.M.", conceived and realised the very first exponential cones. He then launched the first 6.5"; 8.5"; 10"; 11"; and 13" wide range driver. According to our sources, an American company called "UNIVERSITY" made the only drivers capable of comparison.

The first "S.E.M." drivers using Alnico or Ticonal permanent magnets have been produced in the late 40's.

Mrs DORLIAC, whom was Italian, was in touch with the owners of the company "RADIOPHONO E ELECTROPHONO". In 1956, she registers the brand "SUPRAVOX" and installs her factory in Paris 46, rue de Vitruve in the ex buildings of Henry de FRANCE, inventor of the SECAM precede. Then starts the production of speakers under the brand "SUPRAVOX". Using the knowledge of "S.E.M." especially in exponential cones and high sensibility wide range transducers.

At the same time, the company "SIARE" is created by an ex employee of "SUPRAVOX".

In the world, Germans prefer to use radial cones although Americans, especially with "ALTEC" work with exponential cones.

Between 1956 and 1960 the French trust of T.V. and radio manufacturers called "CGTVE" and regrouping "T.V.A.", "AMPLIX", "TELEMASTER", "AIRPHONE" etc…ordered most of their speakers to "SUPRAVOX", especially the drivers equipped with a ticonal magnet and a magnetic proof engine cap.

In the same time, "SUPRAVOX" with 40 cabinets equipped with the 11" drivers participates to the acoustic insulation of the English/French supersonic plane CONCORDE.

In 1979, Mr GHIO, an ex engineer from "THOMSON ELECTRONIQUE" takes the direction of SUPRAVOX after the accidental death of Mrs DORLIAC. With a friend of his that was carpenter, Mr GHIO, started building Hi-Fi cabinets for audiophiles : Salon, Piccola, RV cabinets…