AKG HC644 MD - Headset Condenser Microphone with Cardioid Polar Pattern and 100Hz to 15kHz Frequency Response in Black Finish

The AKG HC644 MD Head-Worn Microphone is a versatile, high-performance microphone designed for a wide range of professional applications such as corporate speaking, educational presentations, and fitness instruction. Building upon the success of AKG's previous headsets, the HC644 MD features an enhanced design that delivers superior sound quality, durability, and reliability. Whether you're delivering a keynote address, teaching a class, or guiding a fitness session, this microphone ensures you're heard clearly, even in noisy or challenging environments.

One of the key improvements in the HC644 MD is its smaller, more sensitive back-electret condenser capsule. This provides a flat frequency response for natural, studio-quality sound reproduction, making it an excellent choice for professional voice capture. The cardioid polar pattern effectively rejects off-axis noise, reducing feedback and ambient interference from the rear and sides. This ensures that your voice remains the focal point, even in acoustically challenging spaces. The uniform polar pattern allows for optimal sound capture, minimizing distortion and providing clean, clear audio.

The HC644 MD is designed to withstand the rigors of extensive use, with a moisture-resistant design that ensures reliable operation, even in sweat-inducing environments such as fitness instruction. Its solid RF shielding provides high rejection of radio frequency interference, making it ideal for use in environments with multiple wireless systems, including low to mid-price systems operating in the 2.4 GHz range. This ensures that your microphone's performance remains unaffected by nearby wireless signals, providing consistent and uninterrupted audio capture.

Weighing just 0.07 lbs, the HC644 MD is incredibly lightweight and comfortable for extended use. The microphone comes with a Microdot adapter, making it compatible with a variety of wireless systems, ensuring flexibility and ease of use. The microphone's cable is conveniently connected via a 2-pin Microdot connector, offering secure and stable performance. The HC644 MD also includes a windsreen and a carrying case, ensuring that the microphone is well-protected during transport and storage.

With a frequency response of 100 Hz to 15 kHz and a maximum SPL of 135 dB, the AKG HC644 MD is an excellent choice for high-quality vocal capture, whether in the studio, on stage, or during dynamic fitness sessions. Its sweat-resistant design, reliable performance in RF-sensitive environments, and superior sound quality make it an essential tool for professionals seeking a lightweight, durable, and high-performing head-worn microphone.

Features

• Cardioid polar pattern for excellent rejection of off-axis noise and feedback
• Flat frequency response (100 Hz to 15 kHz) for natural, accurate sound reproduction
• Moisture-resistant design ensures reliable operation in sweaty or humid environments
• Solid RF shielding provides high rejection of radio frequency interference, ideal for use in RF-sensitive environments
• Lightweight design (0.07 lbs) for comfort during extended wear
• Microdot connector for compatibility with a wide range of wireless systems
• Maximum SPL of 135 dB for distortion-free audio even in high-pressure environments
• Includes an MDA1 AKG adapter connector, windscreen, and carrying case for convenience and protection
• Ideal for corporate speaking, educational presentations, fitness instruction, and more

Specifications

General

• 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)

Dimensions/Weight

• Length: 7.87 inches
• Width: 5.12 inches
• Height: 1.38 inches
• Net Weight: 0.07 lbs (including cable)

Audio Output

• Connector: 2-pin Microdot

Powering Interface

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

What's Included

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