Sennheiser MEB 104-L B Cardioid Boundary Microphone with LED Ring

Discreet Flush-Mount Audio with Visual Status: Sennheiser MEB 104-L B

The Sennheiser MEB 104-L B is a premium installed boundary layer microphone designed to seamlessly integrate into tabletop surfaces, executive desks, and ceiling tiles in modern AV environments.

Equipped with Sennheiser’s proven cardioid condenser capsule, the MEB 104-L B is specifically tuned for optimal speech intelligibility in acoustically challenging spaces. Its directional pickup pattern isolates speaker voices while dampening off-axis background noise and room reverberation. The integrated bi-color LED ring gives presenters and meeting participants immediate, clear visual status (such as Mute/Active) driven by external media control systems or logic switches. Available now in our Sennheiser pro audio store catalog, this boundary microphone combines architectural elegance with broadcast-grade vocal clarity.

Key Features & Pro-Level Advantages

• Cardioid Boundary Pickup Pattern: Delivers precise acoustic directivity, suppressing ambient table noise, HVAC hum, and room reflections.
• Bi-Color LED Light Ring: Provides visual feedback (Red/Green) controlled via standard TTL logic voltage for seamless integration with DSP systems or logic controllers.
• Low-Profile Architectural Integration: Mounts flush into surfaces using a threaded M20 shank, extending just 19 mm above the table or ceiling for an unobtrusive appearance.
• 5-Pin XLR Connector: Handles simultaneous balanced audio output and logic signal control for the bi-color LED status light.
• Wide Frequency Response (40 Hz – 20 kHz): Captures full-spectrum vocal nuances with crystal-clear articulation and warm tonal balance.
• RF Shielding & Heavy-Duty Build: High immunity against mobile phone interference and radio frequency noise in active corporate environments.

Key Technical Specifications

• Device Type: Installed Boundary Layer Microphone with LED Status Ring

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• Transducer Principle: Pre-polarized Electret Condenser

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• Polar Pattern: Cardioid

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• Frequency Response: 40 Hz – 20,000 Hz

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• Sensitivity: 14 mV/Pa

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• Nominal Impedance: 200 Ohms (at 1 kHz)

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• Maximum Sound Pressure Level (SPL): 125 dB SPL

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• Equivalent Noise Level: 28 dB(A)

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• Dynamic Range: 97 dB(A)

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• Connector: 5-pin XLR Male (XLR-5M: Audio +/-/GND + LED Green/Red control)

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• LED Status Control: High level > 2.4 V (Green), Low level < 0.4 V (Red)

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• Phantom Power Requirements: 24 V – 48 V DC

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• Current Consumption: 6 mA

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• Mounting Thread: M20 threaded barrel

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• Dimensions: Overall height 90 mm (19 mm above surface), Diameter 28.5 mm

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• Weight: Approx. 60 g (2.12 oz)

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• Color / Finish: Matte Black (B)

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Compatibility & System Integration

• Installation & Surface Mounting: Mounts securely through a standard table or ceiling drill hole using the included M20 thread, hex nut, and rubber isolation rings to prevent mechanical surface vibration.

• DSP & Logic Controller Integration: Connects seamlessly to digital signal processors (DSPs) such as Biamp, Q-SYS, Symetrix, or the Sennheiser MAS 133 in-line logic box via its 5-pin XLR termination to trigger LED light state changes.

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• Powering: Operates on standard 24V–48V phantom power provided by audio mixers, DSP interfaces, or IP audio endpoints.

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• Box Contents: 1x Sennheiser MEB 104-L B boundary microphone (Black), 2x Rubber mounting isolation rings, 1x Mounting hex nut.

• System Expansion: Explore matching DSP logic switches, cables, and installation hardware on our Sennheiser Brand Store.