AKG HC644 MD: The Ultimate Head-Worn Wireless Microphone
Upgrade your audio game with the AKG HC644 MD! Building on the legacy of the C544 and C555, this high-performance head-worn condenser microphone is a must-have for presenters in the corporate world and fitness enthusiasts alike. • Compact and lightweight design for maximum comfort during extended use. • Exceptional RF shielding to ensure crystal-clear audio, even in noisy environments. • Sweat-resistant construction for reliable performance during intense workouts or presentations. The HC644 MD is compatible with all major wireless systems on the market, making it the perfect choice for a wide range of applications. Whether you're hosting a corporate event, leading a fitness class, or recording a podcast, this microphone delivers professional-grade sound quality every time. Don't settle for anything less than the best. Upgrade to the AKG HC644 MD today!
Specifications
- Type: Back-electret condenser
- Audio frequency bandwidth: 20 - 20000 Hz
- Equivalent noise level: 34 dB-A
- Sensitivity: 20 mV/Pa
- Max. SPL for 1 % THD - 135 dB: Yes
- Electrical impedance: 200 Ohms
- Recommended load impedance: 2000 Ohms
- Self noise: 60 mW
- Polar Pattern: Cardioid
- Dimensions
- Length: 200 mm
- Width: 130 mm
- Height: 35 mm
- Net Weight: 30 g
- Audio Output
- Powering Interface
- Application
- Sports / Fitness
- Assisted Listening
- Sound Reinforcement
- Presentation
- Retail
- Included:
- 1 x HC644 MD Head-Worn Microphone
- 1 x MDA1 AKG Adapter Connector
- 1 x Windscreen
- 1 x Carrying Case

The AKG HC644 MD is a high-performance head-worn wireless microphone designed for presenters in the corporate market and fitness enthusiasts. It features a smaller capsule design with higher sensitivity, exceptional RF shielding, and a sweat-resistant design. The microphone is compatible with all major wireless systems on the market and comes with a MDA1 AKG Adapter Connector, a windsreen, and a carrying case. The microphone has the following specifications: Type: Back-electret condenser, Audio frequency bandwidth: 20 - 20000 Hz, Equivalent noise level: 34 dB-A, Sensitivity: 20 mV/Pa, Max. SPL for 1 % THD - 135 dB: Yes, Electrical impedance: 200 Ohms, Recommended load impedance: 2000 Ohms, Self noise: 60 mW, Polar Pattern: Cardioid, Dimensions: Length: 200 mm, Width: 130 mm, Height: 35 mm, Net Weight: 30 g, Audio Output: Contacts: 2-pin Microdot, Powering Interface: Voltage: 1 to 10 V. The microphone is suitable for sports, fitness, assisted listening, sound reinforcement, presentation, and retail applications.