The Cometson was the successor of the Comet Sound. The first series were provided without any amplifier or speaker. The projector could be connected to a radio by means of a special cable. The second series came with a speaker and a separate amplifier. The famous Magnetofoni Castelli company from Milan where involved in the development of the sound part of the projector. Their logo can be found on the control panel and on the underside of the projector.

Only two years later, the Cometson was succeeded by the CirseSound.