Opinion

Reading the review of HiFi Rose's RA280 amplifier had me thinking about the ways in which technology has developed over the decades. Modern audio enthusiasts are fairly familiar with the choice between 'solid-state' electronics and 'valve' (or 'tube' for our American colleagues). However, the full story of the choice of devices used for audio and radio kit has shown far more evolution over the decades - and is probably now evolving again.