Broadcast Headphone Headset


Broadcast Headset:NoiseGarddynamic microphone
Varenummer 502453


The closed and supra-aural headsets HMDC 26 are lightweight and designed for use in broadcast applications at TV and Radio for use in extremely noisy environments. The headphones are dimensioned for high maximum SPL. HMDC 26 provides high wearing comfort in combination with a good noise attenuation. The HMDC 26 for Broadcast is equipped with Peak Level-Protection which protects the user from volume peaks.

The dynamic microphone with hyper-cardioid characteristic satisfies with perfect broadcast sound up to 16 kHz. It is mainly designed for applications in noisy environments. Another important feature is the less sensitivity against structure-born sound. The gooseneck microphone can be used either on left or right-hand side. The microphone boom allows an individual adjustment at the right position


  • Lightweight broadcast headset

  • Extremely comfortable to wear, even for extended listening, due to the two-piece automatic headband and soft ear pads

  • Single-sided cable routing

  • Headphones for high maximum SPL

  • Active Noise Reduction with NoiseGard

  • Peak Level-Protection - safeguards you from volume peaks above 110 dB

  • "Flip-away" headphone allows single-sided listening

  • Dynamic mikrophone (hyper-cardioid pattern)

  • Flexible microphone boom, can be worn on either left or right-hand side

  • Muting of microphone once mic position is upright

  • Cable, microphone boom and ear pads can be changed easily due to modular concept

  • Warranty 2 years

Kassen indeholder

  • Headset
  • Wind- and pop screen
  • Cable clip
  • User manual

Tekniske data

  • Farve
  • Impedans
    600 Ohm mono / 1.200 Ohm stereo
  • Frekvensområde (mikrofon)
    40 Hz - 16.000 Hz
  • Frekvensområde (hovedtelefoner)
    20 Hz - 18.000 Hz
  • Characteristic SPL
    1kHz, 1mW: 108 dB
  • Characteristic SPL
    1 KHz, 1V: 110 dB
  • THD v. 1 kHz
    < 0,5 %
  • Ørekobling
  • Transducer-princip
    dynamic, closed
  • Vægt
    w/o cable: 210 g
  • Dæmpning
    15 - 30 dB
  • Nominal impedance
    300 Ohm
  • Temperatur (opbevaring)
    -55 °C... +70 °C
  • Temperatur (drift)
    -15 °C... +55 °C
  • Output voltage
    0,4 mV / Pa at 1 kHz
  • Max. lydtryk
    120 dB SPL at 1 kHz
  • Noise compensation (active)
    > 18 dB (100 - 300 Hz)


  • What is the maximum SPL of a dynamic microphone?

    It is a common saying that dynamic microphones just have no maximum SPL.
    This saying is not technically exactly correct but for every day use use of dynamic microphones you will not find gain limitations. At SPL levels above 160 dB some mechanical problems might occur (for example the voice coil might crash onto the magnet) but these SPL levels are very hard to find in real world.
    Here at Sennheiser we use dynamic microphones for distortion measurements on loudspeakers at very high sound pressure levels. At Sennheiser we have measured the SPL and THD inside a large 2" driver/horn combination with a MD 421. The max SPL this combination was able to produce was 150 dB and the THD level recorded by a MD 421 was below 1% (produced by the driver not by the mic)
    So as a conclusion we can state the MD 421 has no maximum SPL limitations for practical use. However if using dynamic microphones at high SPL levels a user should be aware that the very high voltage (up to several volts) delivered by the microphone might cause problems when connected to mic preamps.

    HMDC 26 - 600 ( #502453 )