HC644 MD


Head-worn microphone

This item is currently not available to order online directly from AKG.

Stay smart and dry

Following up on the legendary performance of the C544 and C555, AKG has created the next generation of head-worn microphone, the new HC644 MD. This high-performance head-worn condenser microphone is the perfect tool for presenters in the corporate market but also ideal for sport applications like aerobics. More and more wireless systems in the low to mid-price range are based on 2.4 GHz technology causing nasty interference with microphones. The new HC644 MD is well protected against those problems. The main improvements of the new version are a smaller capsule design with a higher sensitivity, an exceptional RF shielding, a sweat-resistant design and the ability to fit to all major wireless systems on the market.

Varenr. 2793H00100


Type Back-electret condenser
Polar Pattern Cardioid
Sensitivity (1m) 20 mV/Pa (9V/18kOhms)
Audio frequency bandwidth 100 - 15000 Hz (+/-3dB)
Electrical impedance 200 Ohms
Recommended load impedance 2000 Ohms
Equivalent noise level 34 dBA
Signal to Noise (1Pa) 60 dBA
Max. SPL for 1 % THD 135 dB
Temperature range -20°C to +60°C (14°F - 140°F)


Length 200 mm
Width 130 mm
Height 35 mm
Net Weight 30 g (including cable)

Audio Output

Connector 2-pin Microdot

Powering Interface

Operation voltage 9V (2V - 10V)
Recommended serial impedance 18kOhms (2kOhms - 18kOhms)
Current Consumption ≤ 500μA RL=2.2Kohms Vs=2.0VDC


Sports / Fitness Ja
Assisted Listening Ja
Sound Reinforcement Ja
Presentation Ja
Retail Ja


Headset Microphone Ja
  • 1 x HC644 MD Head-Worn Microphone
  • 1 x MDA1 AKG Adapter Connector
  • 1 x Windscreen
  • 1 x Carrying Case

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