AKG HC644 MD

Head-Worn Microphone

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.

Features

• Studio-quality sound
• High RF rejection
• Highly moisture-resistant design
• Uniform polar pattern
• Microphone adapter

Specifications

• 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)

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

Application

• Sports / Fitness: Yes
• Assisted Listening: Yes
• Sound Reinforcement: Yes
• Presentation: Yes
• Retail: Yes

Device

• Headset Microphone: Yes