Premier Bi-directional Ribbon Microphone

Offering pristine audio performance, the KSM353/ED features revolutionary Roswellite® ribbon technology that delivers unprecedented durability in a ribbon microphone.


  • Bi-directional polar pattern delivers premier, completely symmetrical audio with superior off-axis rejection
  • Revolutionary Roswellite® proprietary ribbon material replaces traditional foil ribbons with high-tensile strength, toughness, and shape memory that provides superior resilience at extreme SPLs
  • Patented custom ribbon motor assembly tailors bass response without attenuating the overall output for full low and mid ranges, and superior upper range presence from a rising frequency response
  • Double-shielded matched full-sized transformer minimizes signal loss and maximizes output while reducing magnetic and RF interference from 90-degree placement, offset relative to the ribbon
  • 146 dB SPL across 30 – 15,000 Hz frequency response ideal for capturing fast transients in vocals, acoustic instruments, and concert halls
  • Legendary Shure quality and superior construction from hand-assembly of machined steel, silver, gold, and aluminum materials, and housed in a pure stainless steel casing

Shure KSM353/ED: Bi-directional ribbon microphone


Transducer Type

  • Roswellite® Ribbon

Polar Pattern

  • Bidirectional

Frequency Response

  • 30 to 15,000 Hz

Output Impedance

  • 330 Ω

Sensitivity open circuit voltage, @ 1 kHz, typical

  • -53.5 dBV/Pa[1] (2.11 mV)

Maximum SPL

  • 146 dB SPL


  • Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3


  • Machined stainless steel


  • Microphone: 633 g (1.4 lbs)
  • with shockmount: 950 g (2.1 lbs)

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