Crown CM-311A Differoid Headworn Condenser Vocal Microphone — Beltpack + Original Hard Case

Professional Crown CM-311A headworn condenser vocal microphone with its original beltpack electronics module and Crown-branded molded carrying case.

The CM-311A is one of Crown's most respected stage vocal microphone designs, developed specifically for performers who need hands-free operation, excellent isolation, and exceptional gain before feedback.

Legendary Crown Differoid technology

Unlike conventional headset microphones, the CM-311A uses Crown's proprietary Differoid differential microphone technology to emphasize the performer's voice while reducing surrounding stage noise.

The result is a clear, powerful, focused vocal sound with excellent rejection of nearby instruments and monitors.

An outstanding choice for singing drummers, keyboardists, guitarists, theatrical performers, and energetic frontpersons.

Features

• Professional cardioid differential condenser microphone
• Crown Differoid noise-canceling technology
• High gain before feedback
• Excellent stage-noise rejection
• 50 Hz–15 kHz frequency response
• Handles sound pressure levels up to 148 dB SPL
• Adjustable headset and boom
• Beltpack electronics module with microphone controls
• Operates from a 9V battery or 18–48V phantom power
• Professional XLR output
• Black finish

Included

• Crown CM-311A headworn microphone
• Original Crown beltpack electronics module
• Attached microphone cable
• Foam windscreen
• Crown-branded molded hard carrying case

Condition

Good to Very Good cosmetic condition, with normal signs of previous use and storage. The microphone windscreen shows some age-related wear. The case has normal surface wear.

Please review the photographs for the exact cosmetic condition.

Functional condition: In perfect working condition.

About this model

The Crown CM-311A became a popular professional headset microphone for live performers because it combined hands-free convenience with vocal isolation and feedback resistance normally associated with carefully positioned handheld microphones.

Its wired beltpack configuration is especially convenient for performers who do not need a wireless system.