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Shure 577B
Noise Canceling Dynamic Paging Microphone

OUR PART #  577B

Our Price: $130.15
List Price: $165.00
You save 21%! (Low Price Guarantee)
In Stock

Shure's 577B noise-cancelling dynamic paging microphone is designed for communications and paging applications that require highly intelligible, low noise output.  It can be used in all types of mobile communications, from amateur radio to helicopter news and traffic reports.  It is also suitable for public address and paging systems in noisy areas such as factories, airport terminals, and restaurants.

The 577B microphone represents a significant improvement over most microphones with anti-noise features.  Shaped frequency response, directionality, and distant sound discrimination contribute to total noise reduction.  The microphone operates on the pressure-gradient principle and has two sound entry ports spaced a small distance apart.

The modular design of the 577B microphone greatly facilitates field servicing.  The cartridge, switch, and cable can be replaced in a matter of minutes, if necessary.

The 577B is built to withstand mechanical shocks, vibration, high temperatures, and humidity.  The exclusive ARMO-DUR® case is impervious to oil, grease, fumes, salt spray, sun, and corrosion.  The "Million-Cycle" press-to-talk switch ensures years of reliable service.

A mounting bracket is supplied to provide convenient hang-up when the microphone is not in use.

Shure 577B Features:

  • Frequency response tailored for close-talk operation
  • Extremely effective noise cancellation
  • Dynamic microphone cartridge
  • Modular design
  • "Million-cycle" leaf-type press-to-talk switch
  • TRIPLE-FLEX® cable provides three to four times the flex life of most coiled cords
  • Rugged ARMO-DUR ® case
  • Built-in hang-up button and supplied mounting bracket

Shure 577B Specifications:

  • Type: Dynamic, noise-canceling
  • Frequency Response: 100 Hz to 5 kHz
  • Impedance (at 1 kHz): Rated at 150 Ohm (175 Ohms actual) for connection to microphone inputs rated at 19 to 300 Ohm
  • Output Level (at 1,000 Hz, 5/16"): Open Circuit Voltage-66.0 dBV/Pa (0.5 mV)
    *0 dB = 1 volt per 1Pascal/94 dB SPL
  • Hum Sensitivity: Equivalent to 32 dB SPL in 1 millioersted field
  • Operating Temperature Range: -40° to 74° C (-40° to165° F)
  • Switch Type: Double-pole, single-throw, leaf-type, push-to-talk
  • Cable: Non-detachable 1.8 m (6 ft), neoprene-jacketed coil cord, four-conductor (two conductors shielded)
  • Net Weight: 330 grams (11.6 oz)
  • Supplied Accessory: Mounting Bracket
  • Replacement Parts (sold separately):
    • R98B cartridge
    • C117 cable
    • RK338S switch
  • Certifications:
    • Eligible to bear CE Marking
    • Conforms to European EMC Directive 89/336/EEC
    • Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments

Click to download

Shure 577B
Noise Canceling Dynamic Paging Microphone

OUR PART #  577B

Product Information:

Shure's 577B noise-cancelling dynamic paging microphone is designed for communications and paging applications that require highly intelligible, low noise output.  It can be used in all types of mobile communications, from amateur radio to helicopter news and traffic reports.  It is also suitable for public address and paging systems in noisy areas such as factories, airport terminals, and restaurants.

The 577B microphone represents a significant improvement over most microphones with anti-noise features.  Shaped frequency response, directionality, and distant sound discrimination contribute to total noise reduction.  The microphone operates on the pressure-gradient principle and has two sound entry ports spaced a small distance apart.

The modular design of the 577B microphone greatly facilitates field servicing.  The cartridge, switch, and cable can be replaced in a matter of minutes, if necessary.

The 577B is built to withstand mechanical shocks, vibration, high temperatures, and humidity.  The exclusive ARMO-DUR® case is impervious to oil, grease, fumes, salt spray, sun, and corrosion.  The "Million-Cycle" press-to-talk switch ensures years of reliable service.

A mounting bracket is supplied to provide convenient hang-up when the microphone is not in use.

Shure 577B Features:

  • Frequency response tailored for close-talk operation
  • Extremely effective noise cancellation
  • Dynamic microphone cartridge
  • Modular design
  • "Million-cycle" leaf-type press-to-talk switch
  • TRIPLE-FLEX® cable provides three to four times the flex life of most coiled cords
  • Rugged ARMO-DUR ® case
  • Built-in hang-up button and supplied mounting bracket

Shure 577B Specifications:

  • Type: Dynamic, noise-canceling
  • Frequency Response: 100 Hz to 5 kHz
  • Impedance (at 1 kHz): Rated at 150 Ohm (175 Ohms actual) for connection to microphone inputs rated at 19 to 300 Ohm
  • Output Level (at 1,000 Hz, 5/16"): Open Circuit Voltage-66.0 dBV/Pa (0.5 mV)
    *0 dB = 1 volt per 1Pascal/94 dB SPL
  • Hum Sensitivity: Equivalent to 32 dB SPL in 1 millioersted field
  • Operating Temperature Range: -40° to 74° C (-40° to165° F)
  • Switch Type: Double-pole, single-throw, leaf-type, push-to-talk
  • Cable: Non-detachable 1.8 m (6 ft), neoprene-jacketed coil cord, four-conductor (two conductors shielded)
  • Net Weight: 330 grams (11.6 oz)
  • Supplied Accessory: Mounting Bracket
  • Replacement Parts (sold separately):
    • R98B cartridge
    • C117 cable
    • RK338S switch
  • Certifications:
    • Eligible to bear CE Marking
    • Conforms to European EMC Directive 89/336/EEC
    • Meets applicable tests and performance criteria in European Standard EN55103 (1996) parts 1 and 2, for residential (E1) and light industrial (E2) environments

Click to download

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