Best headset microphone on the planet.  Period.  Used by Garth and Britney and many others.  Fullest sound and VERY high resistance to feedback.  I had previously bent the boom portion of the microphone and I sent it to Harman/Crown and they were great and they completely repaired the microphone.  It is basically new.

The Crown CM-311A is a comfortable headset microphone that is both lightweight and able to stand up to the wear and tear of clinging to your head as you jump around. The CM-311A's electret condenser provides full, clean sound, and the headband and mic boom can adjust to even the biggest head. Designed for the stage, the CM311A headset mic is a must for any vocalist who needs a headworn mic!

The CM311A's cardioid pattern offers excellent noise canceling. With extremely high gain before feedback, your voice will always cut through. The CM311A's sound quality is excellent! It's outfitted with an XLR connector on a battery/phantom-power belt pack. The bodypack power supply is included.

Crown CM311A Headset Microphone Features:

  • Cardioid condenser headset microphone
  • Solid, comfortable fit 
  • Improved sound quality 
  • Increased gain before feedback 
  • No bleed through from monitors or stage noise 
  • XLR output
  • Frequency Response 50Hz to 17 kHz
  • Noise: 26 dB A-weighted
  • Max SPL: 140dB

Tech Specs

Microphone TypeCondenser
ColorBlack
ConnectorXLR
Polar PatternCardioid
Frequency Response50Hz-17kHz
Max SPL148dB SPL (3% THD)
Output Impedance75 ohms
Signal to Noise Ratio68dB
Self Noise26dB (A weighted)
Cable Length3.5 ft.
Weight.13 lb.
Included AccessoriesCarry case, pop filter, clothing clip
Manufacturer Part Number6000H50930