The C414 is probably the best-known microphone that AKG make, alongside the legendary C12. Nevertheless, the C414 has undergone a number of evolutionary changes over its long lifetime, changing shape, adding and discarding transformers, and now, in its latest incarnation, sprouting LEDs! Although the overall shape of the new versions is unmistakably C414, virtually everything about the microphone has been redesigned in an effort to retain the original sound, while at the same time improving the technical performance. AKG cite 15 improved features, though one of these relates to the depth of engraving and the colour of the infill, so clearly some are of more importance than others!