The Sennheiser ME-104 is a compact cardioid condenser microphone capsule designed for professional applications requiring discreet, high-quality audio capture in close proximity to the sound source. This miniature capsule is engineered to attach directly to compatible Sennheiser wireless bodypack transmitters or small preamplifiers, creating a highly concealable lavalier or head-worn microphone solution. Its cardioid polar pattern provides focused frontal pickup, effectively capturing sound from the front while attenuating ambient noise and feedback from the sides and rear. This makes it an ideal choice for theater, broadcast, and professional presentation where the microphone must remain invisible to the audience or camera but deliver clear, intelligible speech. The capsule's small size allows for easy hiding under clothing, in wigs, or on eyeglass frames.

Despite its miniature dimensions, the ME-104 incorporates a high-quality electret condenser transducer known for its smooth frequency response and natural vocal reproduction. It requires standard plug-in-power or bias voltage, typically supplied by the connected transmitter or preamp, to operate its internal preamplifier circuitry. The design prioritizes durability and consistent performance, with a robust metal housing protecting the delicate diaphragm. The included comprehensive accessory kit offers various mounting options, such as specialized clips, adhesive pads, and a tie clip, to facilitate secure and discreet placement in any scenario. Its performance is characterized by clear midrange presence and controlled low-end response, minimizing boominess and handling noise.

For sound engineers and wireless microphone technicians, the ME-104 represents a reliable and versatile tool for achieving clean audio in challenging concealment situations. Its cardioid pattern offers a practical compromise between the isolation of a supercardioid and the consistent off-axis response of an omnidirectional pattern, making it forgiving for performers who move their heads. When integrated into a professional wireless system, this capsule provides broadcast-quality audio that is critical for television, film, and live staged productions, ensuring that dialogue is captured with clarity and detail without the visual intrusion of a larger microphone.