SC 630/660 ATC/C3

Sennheiser SC 630 ATC/C3 AG (single-sided) and SC 660 ATC/C3 AG (double-sided) are premium quality headsets for Air Controllers and C3 operators demanding superb sound, durability and comfort.
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The Sennheiser SC 660 ATC/C3 AG series of premium-quality headsets for Air Traffic Control, C3 operations and communications operators delivers outstanding sound performance where it counts. The exceptional wideband voice clarity delivered by the series’ ultra-noise cancelling microphone ensures that commands come through loud and clear – even in noisy environments like a busy control tower. Their premium quality build, with steel reinforcement at vulnerable speaker joints, means that these headsets never lose their out-of-the-box fit and a fully adjustable reinforced headband and generous leatherette ear pads are made to maximize comfort. Sennheiser ActiveGard® technology protects users’ hearing against acoustic injury caused by a sudden sound burst on the line, with no risk of communication drop-out.


  • Sennheiser Voice Clarity for accurate communication, provides a natural listening experience

  • Perfect speech transmission Ultra noise-cancelling microphone filters out ambient noise for optimum speech clarity to reduce “call-back/read-back” events

  • Sound protection from acoustic injury caused by sudden sound bursts on the line with Sennheiser ActiveGard® technology

  • Two channel application for air and land based communication on SC 660 ATC/C3 AG

  • Extreme durability with stainless steel hinge on speaker joints

  • Exceptional wearing comfort with large leatherette ear-pads

Technical Data

  • Impedance
  • Frequency response (Microphone)
    150-6,800 Hz
  • Transducer principle (Microphone)
    Electret-microphone, ultra-noise cancelling
  • Frequency response (Headphones)
    50-18,000 Hz
  • Characteristic SPL
    103 dB SPL at 1 kHz, 1 mW, 107 dB SPL at 1 kHz, 1 V
  • Contact pressure
    SC 630: Approx 1.0 N, SC 660: Approx 1.5 N
  • Ear coupling
    supra-aural (on ear)
  • Connection cable
  • Transducer principle
    dynamic, open
  • Weight
    SC 630: 77 g/2.72 oz, SC 660: 110 g/3.88 oz
  • Storage temperature
    -55 °C - +70 °C
  • Operating temperature
    -15 °C - +55 °C
  • Output voltage
    38dBV, +/- 3dB
  • Color
  • Operating voltage (stand alone)
    1-10 V DC
  • THD + N, total harmonic distortion and noise
    <1 % at 102 dB SPL at 1 kHz


  • Fact Sheets
    • Sc 630/660 ATC/C3 Fact Sheet (830 KB) Download

  • EU Declaration of Conformity
    • EC declaration SC 630/660 C3 ATC (290 KB) Download

  • Digital Brochures
  • Safety Guides
    • SC 200 & 600 ATC series safety guide (590 KB) Download

WARNING (for California residents only): This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects and other reproductive harm. For more information go to: