Sennheiser SL DW Boundary 114

SL DW Boundary 114 is a wireless tabletop boundary-layer microphone created for contemporary conference rooms, meeting spaces and presentation environments where clear speech and flexible placement without cables are critical.

Operating within the SpeechLine Digital Wireless system, the microphone is fully optimized for voice. Its cardioid pickup pattern reduces ambient noise and focuses on the speaker, while the boundary-layer design minimizes reflections from the table surface – resulting in natural, intelligible speech even in challenging acoustic conditions.

The microphone runs on the BA 40 battery, providing up to 13 hours of operation. It supports two charging methods – via USB or wirelessly via the CHG 2W induction station. The housing includes LED indicators showing power and operating status.

SL DW Boundary 114 offers full remote monitoring and control through Sennheiser Control Cockpit: users can track battery level, mute status, RF signal strength and manage settings or firmware updates. This ensures seamless integration into large corporate installations with centralized system management.

Its compact, discreet form factor blends seamlessly into any meeting table, staying unobtrusive while delivering professional-grade audio performance.

Key features:

• Wireless operation in the SpeechLine Digital Wireless system
• Boundary-layer design for clean and focused speech
• Cardioid pickup pattern for accurate voice capture
• Up to 13 hours of battery life
• Charging via USB or CHG 2W induction station
• Full remote monitoring via Control Cockpit
• LED indicators for status and battery level
• Stable RF transmission with adaptive power
• Ideal for meeting rooms, conferences and hybrid collaboration spaces

Audio

• AF frequency response: 40 Hz – 20 kHz
• Sensitivity: 10 mV/Pa
• Dynamic range: < 100 dB(A)
• Automatic sensitivity adjustment
• Max input level: 1.7 Vrms
• Input impedance: 30 kΩ

Wireless / RF

• Adaptive RF output power: up to 250 mW (country-specific)
• Compatibility: SpeechLine Digital Wireless family
• Compatible receiver: SL Rack Receiver DW

Power

• Battery: BA 40 Li-Ion accupack, 3.6 V
• Operating time: typ. 13 h
• Charging: inductive wireless charging or via USB
• Optional charger: CHG 2W (wireless power transmitter for 2 devices)

Control

• Remote monitoring/control: Sennheiser Control Cockpit

Environmental

• Operating temperature: 10 °C to 45 °C (battery dependent)
• Storage temperature: -20 °C to 70 °C
• Max relative humidity: 95%

Physical

• Dimensions: 114 × 85.3 × 30.8 mm (4.49 × 3.36 × 1.21 in)
• Weight: approx. 208 g (without accupack)

Package contents

• SL Boundary 114-S DW
• Quick Guide
• Safety Guide

Accessories

• CHG 2W (506805)
• BA 40 (506656)

Variants / frequency ranges

• SL Boundary 114-S DW-3 B (506607): 1880–1900 MHz (EU/UK, India, Indonesia, Hong Kong, Singapore, Malaysia, Australia)
• SL Boundary 114-S DW-4 B (506623): 1920–1930 MHz (USA, Canada, Latin America)
• SL Boundary 114-S DW-5 B (506646): 1893–1906 MHz (Japan)
• SL Boundary 114-S DW-6 B (506636): 1880–1895 MHz (Taiwan)
• SL Boundary 114-S DW-7 B (506965): 1910–1920 MHz (Brazil)