ABSTRACT

Sound reproduction In order to reproduce sound, loudspeaker drivers displace air in response to an incoming voltage that corresponds to a waveform. There is a fundamental difference between the way low and high frequencies are reproduced. Low frequencies call for a rigid, big cone that is capable of displacing a large mass of air. High frequencies, on the other hand, require a light and small diaphragm that can move rapidly. The two requirements obviously conflict. Additionally, low frequencies require a large amount of excursion compared to high frequencies. If a single driver produces both low and high frequencies, the cone displacement caused by low frequencies results in unwanted phase shifts for the high frequencies.