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Sennheiser SL-BOUNDARY-ST-DW-4 SL Boundary SET DW-4 US Speechline Digital Wireless Set


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The SL Boundary SET DW-4 US package from Sennheiser includes the wireless boundary microphone SL Boundary 114-S DW, along with the SL Rack Receiver DW, plus everything needed for installation and usage. The SL Boundary 114-S DW microphone is optimized for speech transmission in conference rooms, and because it's independent from any cables, it offers highly versatile application possibilities for users.

The SL Boundary 114-S DW can be charged either wirelessly or via USB, while the SL Boundary SET DW features inductive charging. Also available is the wireless power transmitter CHG 2W for (2) mobile devices (sold separately). The SL Boundary 114-S DW mic provides clear indication of battery life via its dedicated battery status LEDs. The set includes a rechargeable accupack with up to 12 hours of operating time. Additionally, remote monitoring and control of all devices is available using the Sennheiser Control Cockpit (sold separately).


  • SL Boundary 114-S DW
  • SL Rack Receiver DW including power supply
  • USB cable
  • BA 40 accupack
  • GA 4 rack mount kit
  • Quick Guide


  • Wireless inductive charging
  • Clear battery life indication via dedicated battery status LEDs
  • Remote monitoring and control with the Sennheiser Control Cockpit


  • Frequency response: 40 to 20,000 Hz
  • THD, total harmonic distortion: typical 0.1 %
  • Weight: approx. 208 g
  • Pick-up pattern: Cardioid
  • Microphone sensitivity: 10 mV / PA
  • Signal-to-noise ratio: > 90 dB(A)
  • RF output power: adaptive, up to 250 mW (country-specific)
  • Operating time: Battery pack: typical 13 h
  • Dynamic range: < 100 dB(A)
  • Frequency range:
    • EU: 1,880 to 1,900 MHz
    • USA: 1,920 to 1,930 MHz
    • Brazil: 1,910 to 1,920 MHz
    • Taiwan: 1,880 to 1,895 MHz
    • Japan: 1,893 to 1,906 MHz
  • Sampling rates: 24-bit/48 kHz


Additional information available by referring to items located under the "DOCUMENTATION" tab above.

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