Shure 545SD Classic Unidyne Instrument Microphone

PA SKU # SHU 545SDLC MFR # 545SD-LC UPC # 042406051873
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  • Product Highlights
  • Cardioid Polar Pattern
  • Dynamic Element
  • Silent On/Off Switch
  • Selectable Impedance
  • 50Hz-15kHz Frequency Response

Dynamic Cardioid Microphone with On-Off Switch, Dual Impedance

The predecessor to the SM57, The 545SD Classic Unidyne Instrument Microphone is a dual-impedance, unidirectional, dynamic microphone.

Shipped connected for low-impedance operation, the 545SD features a silent magnetic reed on/off switch with lock-on option. A favorite for instrument pickup and recording, the 545SD can also be used on lecterns in public address systems.
  • Exceptionally uniform cardioid pattern minimizes feedback
  • Selectable dual-impedance operation
  • Silent magnetic reed on/off switch with lock option
  • Cardioid, dynamic
  • Frequency response: 50 to 15,000 Hz
  • Type: Dynamic
  • Frequency Response: 50 to 15,000 Hz
  • Polar Pattern: Cardioid (unidirectional)-uniform with frequency, symmetrical about axis
  • Impedance: Dual. Microphone rating impedance is 150 ohms (250 ohms actual) for connection to microphone inputs rated at 19 to 300 ohms and "High" for connection to high-impedance microphone inputs. Wired for low impedance as supplied. To change impedance, see sections on lmpedance Selection and Connections in User Guide.
  • Output Level (at 1,000 Hz)
    : Open Circuit Voltage* -58.0 dB (1.3 mV)
    HIGH: Open Circuit Voltage* -35.0 dB (17.6 mV)
    *0 dB = 1 volt per Pascal (1 Pa = 94 dB SPL)
  • Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 (with respect to pin 3).
  • Switch: Built-in magnetic reed on/off switch with lockplate.
  • Cartridge Shock Mount: Internal rubber vibration-isolator Swivel Adapter
  • Positive action, adjustable through 90 degrees from vertical to horizontal, permits easy removal for handheld use, suitable for mounting on stand with 5/8"- 27 thread
  • Case: Chrome-plated die casting with ARMO-DUR grille and stainless steel screen
  • Dimensions: See User Guide
  • Net Weight (less cable): 255 grams (9 oz)
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