The Swan M240 is designed by professional engineers through precise calculating and adjusting, which is a continuation of the M200 series of acoustical elevation structure. It guarantees the sound directly points to listener’s ears. The front plates incline backwards slightly and make a fiducial sound source with tweeter placement. In this way, the speakers make sure that the distance of high and low frequency is the same from the listener. At the same time the irregular box structure can reduce the standing wave and restore a more clear sound.