Sennheiser HMDC 27 Professional Broadcast Headset With NoiseGard

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The Sennheiser HMDC 27 invites the Broadcast Commentators and Audio Engineers to experience the highest level of wearing comfort. As the top-of-the-line model of the HMS 27 Broadcast Headset Series, the HMDC 27 features NoiseGard™ active noise reduction which allows it to perform extremely well in very loud environments. By actively reducing the noise level by an additional 15 dB, this headset increases intelligibility while, at the same time, protecting the user's hearing and avoiding stress and fatigue due to noise. NoiseGard™ does not require the usual batteries but is conveniently powered via the microphone power supply from the broadcast desk or intercom system (Phantom powered P48).

The HMDC 27 is equipped with the automatically opening two-piece headband, hence, no pressure on the sensitive fontanelle. For those users who still prefer a conventional headband, a wide headband padding is included that converts the two-piece headband into a compact single piece.

Sennheiser HMDC 27 - Features:

• Active noise compensation (NoiseGard™) additionally reduces noise by up to 15 dB. No batteries required: power supply via microphone bias voltage from the commentator's unit
• Highest wearing comfort due to the lightweight circumaural and split-headband design (no pressure on the sensitive fontanelle)
• Accurate and linear sound reproduction for very demanding monitoring
• Dynamic microphone which stands out due to a strong and powerful sound pattern for an audio transmission in the highest broadcast quality even in noisy environments
• ActiveGard (on/off switch) for protected hearing against noise peaks greater than 110 dB
• Modular concept of different cables and boom arms to offer highest flexibility
• Cables of the cable 26-II series are compatible
• Swiveling ear cup (45° range) for single-sided listening
• Microphone can be worn either on right or left hand side
• Wide headband padding is included that converts the two-piece headband into a compact single piece

• Headphone:
  • Transducer Principle: Dynamic, closed
  • Ear Coupling: Cirumaural
  • Frequency Response: 8 Hz - 18 kHz
  • Impedance:
    • ANR On: 600 ohms
    • ANR Off: 200 ohms
  • Power Rating: 500mW
  • Sensitivity: 112 dB SPL / 1 Vrms / 1 kHz ANR on, Limiter off 107 dB SPL / 1 Vrms / 1 kHz ANR on, Limiter on/off
  • Maximal SPL:
    • Limiter Off: 115 dB SPL @ 1 kHz ANR on; 128 dB SPL @ 1 kHz ANR off
    • Limiter On: 110 dB SPL @ 1 kHz ANR on/off
  • Ambient Noise Reduction: additional < 15 dB ANR on
  • Distortion: < 0.1% @ kHz, 100 dB SPL
  • Power Supply / Consumption: Phantom Powered P48 12 V - 48 V, < 15 dB ANR on
  • Contact Pressure: Approx. 3.3 N
• Microphone:
  • Type: BMD 434
  • Transducer Principle: Dynamic
  • Directivity: Hypercardioid
  • Transmission Rate: 40 Hz - 18 kHz
  • Sensitivity: 0.5 mV/Pa @ 1 kHz
  • Impedance: 300 ohms
• General:
  • Ambient Temperature:
    • Operation: 5° to +131°F | -15° to +55°C
    • Storage: -67° to +158°F | -55° to +70°C
  • Weight: 8.5 oz | 240 g, without cable