Shure announced a new Limited Edition Unidyne model, the 5575LE Unidyne cardioid dynamic microphone. This comes after Shure was awarded with an achievement of a Milestone Award for its Unidyne technology, by the Institute of Electrical and Electronic Engineers (IEEE). This launch of a new model was also to commemorate the 75th anniversary of the development and availability of the 55 Unidyne microphone.

The 5575LE is a mirror of the original design, with adaptable changes in durability and sound quality. It incorporates the current Unidyne III cardioid element, the classic large outer grill, vintage badging, and zinc die-cast, with a silver finish desk stand.

Introduced in 1939, the 55 Unidyne was swiftly adopted as a microphone of choice for broadcast, public address, recording, and two-way radios. As the popularity of the 55 grew, it found its way into many performance environments. To the industry, the 55 Unidyne provided control of feedback and reduction of off-axis ambient sound. In the hands of popular performers and heads of state, the 55 Unidyne became recognized as a familiar cultural presence and a sign of quality.

The microphone comes in an aluminum flight case with 75th anniversary logo branding, and includes two Unidyne photo prints and a certificate of authenticity, with a tribute from Shure Chairperson Rose L. Shure. Only 5 575 pieces of this model will be available worldwide and look out for this limited edition in South Africa early in 2015.