The limited edition 5575LE Unidyne Cardioid Dynamic Microphone is the 75th anniversary edition of the world"s most iconic microphone. The timeless look and detail of the original 55 Unidyne model"s 1939 debut is available to the public for the first time since the mid-20th century. Blending the original design specifications with modern technology optimization, the 55 Unidyne Microphone celebrates 75 years of peerless engineering and sound quality. Produced in a serialized run of 5,575 units worldwide, this exclusive reissue is equally poised to make a performance statement as it is to become a treasured addition to any microphone collection for years to come.