Ever since the release of the first SR-1 models, ear speakers have served as the most rigorous monitors used by record manufacturers all over the world when recordings were made and as test listening stations during editing. The world of audio has recently made a major transition from analog to digital. But the fact that condenser microphones continue to be used as the entrance to the world of sound suggests that the electrostatic type, as typified by condensers, are one of the best possible types of transducers.