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CAD Audio 651 Small Format Omnidirectional Dynamic Palmheld Microphone

Discontinued (Hide From Search)


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The Astatic 651 is a small-format squeeze-to-talk, dynamic microphone for critical communications applications. The 651 has a tailored frequency response providing clear transmission and maximum intelligibility of speech. The housing is built to withstand rough mechanical impact while the transducer resists atmospheric extremes. The 651 has a simple to operate DPDT long-life, trouble-free, leaf switch. It has a low-impedance output and is factory wired normally open. The 651 may be rewired in the field if a line shorting function is desired. The Astatic 651 is an excellent choice for any application requiring a small-format palmheld microphone for discrete or tight-mounting spaces such as life-safety systems or paging stations where small size is required. The 651 is also suited to most public address and general, multiple-use, commercial paging applications such as factories, airports, lobbies, restaurants, warehouses, etc.


  • Operating Principle: Moving Coil Dynamic
  • Polar Pattern: Omnidirectional
  • Frequency Response: 500Hz - 8KHz
  • Sensitivity: -49dBV (3.6mV) @ 1Pa
  • Impedance: 600 ohms
  • Cable: 6ft (1.8m) extended, four-conductor, two-conductor shielded, coiled
  • Switch: DPDT momentary leaf
  • Case: Impact-resistant plastic
  • Dimensions: See spec sheet (pdf)
  • Net Weight [Mass]: 4.9oz [139g]
  • Packaged Weight [Mass]: 8.0oz [227g]
  • RF Immunity: Meets or exceeds EN55103-2, E1, E2, E3 and E4.

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