The GLXD+ Dual Band Wireless+CM311a is the perfect combination of the automatic frequency management with the new Dual Band Technology provides reliable and consistent performance, while Shure proprietary Lithium-Ion rechargeable batteries provide up to 12 hours of use. Go wireless without complication.

Exceptional digital audio clarity
Compatible with multiple legendary microphone options
Automatically moves away from interference without audio interruption
Rechargeable battery delivers up to 12 hours of runtime
Rock-solid RF performance for multiple system installations
License-free frequency range

The CM-311A is the latest version of the Crowns proprietary Differoid technology. Differoid stands for differential cardioid. Its cardioid pickup pattern rejects sounds from the rear, such as floor monitors. Its noise-canceling ability also rejects sounds at a distance, such as instruments on stage and crowd noise. This results in the CROWN CM-311 having outstanding gain-before-feedback and isolation. Controlled field tests showed that the Differoid provides up to 12 dB more gain before feedback than conventional cardioid microphones. Many users of the Differoid say that their house mix is better because the mic's isolation is nearly complete.

THe Cm311 is Designed for touring and live-sound applications, the Crown CM-311A is a rugged head-worn microphone with unequaled performance. It sounds like the best handheld microphones full, clear, and distortion-free, even with the loudest singers. Lightweight and comfortable, the mics headband and boom adjust to fit any singer. An included pop filter greatly reduces breath noise and pops. Because of the booms unique behind-the-ear design, it does not cover up the singers face

Frequency Band: Z3 (2.4, 5.8 GHz)

MPN: GLXD14+CM311
UPC: 042406695503

• GLXD1+ Dual Band Bodypack Transmitter
  
• System Operating Range
  Indoors: Up to 30 m (100 feet) typical, with a maximum of 60 m (200 ft.) under ideal conditions
  Outdoors: Up to 20 m (65 feet) typical, with a maximum of 50 m (165 ft.) under ideal conditions
  
• Transmit Mode: Shure Proprietary Digital - Dual Band (2.4 GHz and 5.8 GHz)
  Audio Frequency Response: 20 Hz – 20 kHz Note: Dependent on microphone type
  
• Dynamic Range: 120 dB, A-weighted
  
• RF Sensitivity: -88 dBm, typical
  
• Total Harmonic Distortion: 0.07%, typical
  
• RF Output Power: 10 mW E.I.R.P. max
  
• Operating Temperature Range: -18°C (0°F) to 57°C (135°F) Note: Battery characteristics may limit this range
  
• Storage Temperature Range: -29°C (-20°F) to 74°C (165°F)
  
• Battery Life: Up to 12 hours
  
• Power Requirements: 3.7 V Rechargeable Li-Ion
  
• Housing Cast: Metal, Black Powdercoat
  
• Input Impedance: 900 kΩ
  
• RF Output Power: 10 mW E.I.R.P. max
  
• Connector: 4-Pin male mini connector (TA4M)
  
• Configuration: Unbalanced Maximum Input Level (1 kHz at 1% THD): +8.4 dBV (7.5 Vp-p)
  
• Antenna Type: Dual Band Internal Monopole
  
• Dimensions: 4.5 x 2.6 x 1.1 inches (115 x 66.94 x 28.51 mm), without antenna
  
• Weight: 5.4 oz (153.1 g), without battery
  
• Impedance
  XLR Output: 100 Ω
  6.35 mm (1/4-inch) output 100 Ω (50 Ω, Unbalanced)
  Maximum Audio Output Level
  XLR connector (into 600 Ω load): 1 dBV
  6.35 mm (1/4-inch) connector (into 3 kΩ load): +8.5 dBV
  
• Pin Assignments
  XLR Output: 1=ground, 2=hot, 3=cold
  6.35 mm (1/4-inch) connector: Tip=audio, Ring/Sleeve=ground
  
• Antenna Input
  Impedance: 50 Ω
  
• Antenna Type: Dual Band 1/2 Wave Sleeve Dipole, non-removable
  
• Maximum Input Level: −20 dBm
  
• Dimensions 7.2 x 4.8 x 1.6 inches (182.8 x 121.97 x 40.3 mm), antennas folded
  
• Weight: 10.9 ounces (310 g)
  
• Shure GLXD4+ Dual Band Wireless Receiver
  
• System Operating Range
  Indoors: Up to 30 m (100 feet) typical, with a maximum of 60 m (200 ft.) under ideal conditions
  Outdoors: Up to 20 m (65 feet) typical, with a maximum of 50 m (165 ft.) under ideal conditions
  
• Transmit Mode: Shure Proprietary Digital - Dual Band (2.4 GHz and 5.8 GHz)
  
• Audio Frequency Response: 20 Hz – 20 kHz Note: Dependent on microphone type
  
• Dynamic Range: 120 dB, A-weighted
  
• RF Sensitivity: -88 dBm, typical
  
• Total Harmonic Distortion: 0.07%, typical
  
• RF Output Power: 10 mW E.I.R.P. max
  
• Operating Temperature Range: -18°C (0°F) to 57°C (135°F) Note: Battery characteristics may limit this range
  
• Storage Temperature Range: -29°C (-20°F) to 74°C (165°F)
  
• Battery Life: Up to 12 hours
  
• Housing Molded: Plastic
  
• Power Requirements: 14.5 V - 17 V, 600 mA
  
• Spurious Rejection: >35 dB, typical
  
• Gain Adjustment Range: -20 to 40 dB in 1 dB steps
  
• Phantom Power Protection: Yes
  
• Configuration
  
• XLR Output: Impedance balanced
  
• 6.35 mm (1/4-inch) output: Impedance balanced
  CM311a-
  
• Cardioid polar pattern
  Condenser capsule with internal shock mount for efficient
• rejection of mechanical and body noise
  
• Defferoid noise cancelling technologie
  Outstanding gain-before-feedback and isolation
  
• Premium head-worn microphone
  Handsfree use
  
• TA4F -Shure Connector
  Lead vocals
  Backing vocals
  
• Polar pattern: Cardioid
  
• Frequency response: 50 to 17,000 Hz
  
• Sensitivity: CM-311A: 4 mV/Pa (-48 dBV); CM-311L: 1.25 mV/Pa (-58 dBV)
  
• Maximum SPL: 148 dB
  
• Equivalent noise level: 26 dB-A
  
• Signal/noise ratio: 68 dB (A-weighted)
  
• Impedance: 75 ohms balanced
  
• Powering: 18 to 48 V phantom power to DIN/IEC
  
• Finish: Satin black
  
• Dimensions: ear to ear 5.5" (13.97 cm); boom 7" (17.78 cm), boom to mouth 3" (7.62)
  
• Net weight: 61g (2.1 oz.)
  
• Cable: 106 cm (42 in.)