MD 55 is a new soft dome type mid range. The combination of cloth type cone with special coating give a flat response at the critical upper frequency, The special chamber shape is used to control the inside reflection behavior and standing wave energy at the resonance With this small dimension, MD-55 is an ideal mid range for a 3 way system where an easy installation and high quality sound of human voice is required. If use with 90 dB or more tweeter efficiency MD 55 is a good choice for special MTM application.