Shure 450-II

Designed for high-speed intelligibility and exceptional reliability paging and dispatching systems, a dual impedance switch for convenient changeover from low to high. The 450 Series II also features a finger-tip control bar (locking or non-locking action) to activate microphone circuit and an external relay or control circuit. With a long-life switch and an ARMO-DUR® casing, the 450 Series II is designed for dependability under all operating conditions. The optional RK1995 split-bar conversion kit provides Monitor/ Transmit switching.

Features

• Dual impedance
• Locking press-to-talk switch
• Rugged ARMO-DUR base and case
• Adjustable height
• Optional monitor/transmit switch conversion kit

Specifications

• Type: Dynamic
• Frequency Response: 200 to 5,000 Hz
• Polar Pattern: Omnidirectional
• Impedance (at 1,000 Hz)
  • High Impedance: 30,000 ohms
  • Low Impedance: 225 ohms
• Recommended Load Impedance
  • High Impedance: 100,000 ohms
  • Low Impedance: 1,000 ohms
• Output Level (at 1,000 Hz, Open Circuit Voltage)
  • High Impedance: -35.0 dBV/Pa (17.8 mV)
  • Low Impedance: -57.0 dBV/Pa (1.4 mV)
• Switches
  • Locking Press-to-Talk Switch: Activates microphone circuit and an external relay or control circuit. The microphone circuit is normally shorted.
  • Impedance Selection Switch: Double-pole, double-throw slide switch located in the base of the microphone.
• Cable: 2.1 m (7 ft.) four-conductor, two conductorsshielded, non-detachable
• Case: Two-tone gray ARMO-DUR
• Net Weight: 737 grams (1 lb., 10 oz.)
• Shipping Weight: 1020 grams (2 lb., 4 oz.)