In the "1928 Annual and Logbook of the Incorporated RSGB (Radio Society of Great Britain)" I found an advertisement from Celestion depicting 1927-1928 loudspeaker models C10, C12 and C14.  Based on several other sources, however, this advert is mixing up the models C10 and C14. The model at the left should be C14 and the one at the right C10.

In this advert Celestion claims to have used a new patented reinforced diaphragm. Result of this construction would be that "every note in the register of the piano and the organ is emitted with realistic precision".



Advertisement in 1928 RSGB yearbook




My C10 measures 30.5 x 30.5 x 13 cm (w x h x d).

Further info on Celestion and its speakers can be found at


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Last update:  February 15, 2019