To mark the occasion and to commemorate the 75th anniversary of the 55 Unidyne microphone, Shure has launched the 5575LE – a Limited Edition of the classic cardioid dynamic microphone with a few carefully chosen 21st-century upgrades to improve durability and sound quality.

Available in a numbered manufacturing run of just 5575 pieces, the 5575LE pays homage to the original 55 Unidyne by taking on the current Unidyne III cardioid element, the recognizable large outer grill, vintage badging and a zinc die-cast finish, with a silver-finish desk stand.

Introduced in 1939, the 55 Unidyne was internationally adopted as a workhorse microphone for broadcast, public address, recording and two-way radio applications.

By the 1950s it was so well known that it was marketed as “the microphone that needs no name”.

The 55 Unidyne was the first directional microphone to use a single dynamic element and in January 2014, the international Institute of Electrical & Electronic Engineers (IEEE), awarded Shure with a Milestone Award for the product.

The Shure 5575LE Unidyne Limited Edition Microphone will be available from early 2015.

The microphone is supplied in an aluminium flight case with a 75th anniversary logo, including a certificate of authenticity.

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