This Trader advert from September 1950 shows audio products that are still very utilitarian in nature.  Design for function and definitely not for form.     From the top, the 12-watt High Fidelity Amplifier T101, then the Bowl Type Diffuser and finally the 30 Watt AC Amplifier.

Sound Faithfully Reproduced

For a quarter of a century, TRIX have been making sound reproducing equipment for every purpose.  All over the world, in halls and theatres, sports arenas and factories, offices, hotels, ships, and hospitals, TRIX equipment is proving its reliability and adding to the reputation of those who installed it as well as the TRIX team of technicians and research workers.  Install TRIX, reduced service calls, and cut your overheads.

TRIX, send today for details of the TRIX range.

The Trix Electrical Co., Ltd.
1-5 Maple Place, Tottenham Court Road, London W1