In 1970 Rola Celestion was brought together with a publicly-quoted clothing company and the holding company created was named Celestion Industries plc.

    The production of domestic speakers reached a peak after about three years at Ipswich, and then a shift in the market evidenced itself and a noticeable decline in this product became apparent in the factory. Its place, however, was taken by units for the ever increasing demand for high fidelity stereo cabinet systems, and at this time further expansion took place with the acquisition of a modern assembly plant on the Hadleigh Road Trading Estate on the other side of Ipswich. Ditton Works now concentrated on the manufacture in all aspects of hi-fi component units, Power Range loudspeakers and units in the Public Address sector.

    With the surge of interest in hi-fi from the general public, staffing levels reached a peak in January 1974 with a total of 907 employees at the two sites in Ipswich and at Thames Ditton, some of these working night shifts.

    Distribution was now wholly carried out from Ipswich by a new fleet of company vehicles, this being necessary for two reasons. The Thames Ditton factory was gradually run down, eventually closing altogether in 1975, and a new marketing policy by Celestion opened up a great many more smaller distribution points instead of the previous few selected wholesalers.

    To cope with the expansion of the company, the Hadleigh Road site was completely refurbished
during the summer of 1976 and on 29th October the site was officially re-opened by H.R.H. The
Princess Margaret.

    On 20th January 1977 Chairman Mr.D.D.Prenn announced the creation of overseas subsidiaries in France (September 1976), West Germany (October 1976) and U.S.A. (February 1977).

    The increasingly international nature of the company’s business led in 1979 to the adoption of the name Celestion International as a corporate identity for the parent company and all major overseas subsidiaries.