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BidirectionalShure KSM353

Bidirectional Ribbon Microphone

The Shure KSM353 is a passive ribbon microphone voiced to evoke the sound of a U47fet. It was developed by Crowley & Tripp, and originally sold by C&T as the “El Diablo.”

The mic was built to satisfy a challenge from Mercenary Audio’s Fletcher; he requested a ribbon mic that would sound like an MD421 inside a kick drum and a U47fet outside. Crowley and Tripp used the resulting microphone, the El Diablo, to launch their innovative Roswellite ribbon material.

Shure Bros. purchased the entire Crowley and Tripp microphone company from Soundwave Research Laboratories in 2009, including the rights to the Roswellite production process.

The KSM353, like its predecessor, is built by hand in the USA. It ships in a padded wooden box with an elastic shockmount.

MIX, 2010

Compared to the 313, the 353 sounded bigger in the low end and exhibited smoother high frequencies on both vocals and guitars. For voice-overs, it has a good neutral sound without special emphasis on any particular frequency area…

For vocals, the 353 has a near-condenser sound but is smoother in the high frequencies and never seemed to overload, making it a good choice for sibilant or shrill-sounding singers.

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The mic was released in 2009.


Frequency Response - BidirectionalClick Graph to Compare!
KSM353 Bidirectional Frequency Response Chart
Pickup Patterns Pads & Filters
Bidirectional (2.11 mV/Pa; 50 - 12,000 Hz)
Ribbon Construction Impedance SPL/Noise
270 Ohms (Low) Max SPL: 146 dB
Weight Length Max Diameter Interface(s)
633g (22.33oz) 157mm (6.18'') 48mm (1.89'')
  • 3-pin XLR male (1)
Power Specifications

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