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Sennheiser

Sennheiser SL LAVALIER SET DW-4-US R Wireless Lavalier Set [B-Stock]

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This complete wireless lavalier system is part of Sennheiser's SpeechLine Digital Wireless series and operates in the license-free 1.9 GHz band (in the US and Canada). The set includes the SL Bodypack DW transmitter, the stationary SL Rack Receiver DW, and the MKE 1 omnidirectional condenser lavalier microphone. The system features bi-directional communication between the transmitter and receiver, enabling effortless setup with automatic frequency and interference management. Audio is transmitted with secure 256-bit AES encryption to protect confidential conversations. 
The robust bodypack transmitter features a lockable 3.5mm input and is powered by a rechargeable BA 30 lithium-ion accupack, which provides up to 15 hours of operation and can be recharged via USB. The MKE 1 microphone is highly inconspicuous and delivers excellent speech clarity, thanks to its moisture-resistant design and high maximum sound pressure level. The SL Rack Receiver DW offers XLR and RCA audio outputs for easy integration into existing sound systems.

View Product Features

  • Automatic Frequency Management: Automatically and continuously searches for free frequencies, ensuring a stable wireless connection without manual setup.
  • High-Quality Speech Audio: The included professional MKE 1 omnidirectional microphone is optimized for clear speech intelligibility with low ambient noise.
  • Long-Lasting Rechargeable Battery: The BA 30 accupack offers up to 15 hours of continuous operation, with convenient USB recharging.
  • Secure Audio Transmission: Features 256-bit AES encryption to protect confidential audio signals from unauthorized interception.
  • Rackmount Integration: This "-R" version includes a rackmount kit, making it ready for professional installation in standard equipment racks.
  • Easy System Monitoring: The receiver has network integration and is compatible with Sennheiser's Control Cockpit software for remote monitoring and management.
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About the Sennheiser SL LAVALIER SET DW-4-US R Wireless Lavalier Set [B-Stock]

The Sennheiser SL LAVALIER SET DW-4-US R is a professional UHF wireless microphone system configured specifically for discreet, hands-free audio capture. This set includes a compact bodypack transmitter (the DW 4-US) and a high-quality Sennheiser lavalier microphone, creating a complete solution for broadcast, presentation, theater, and video production. Operating in the UHF frequency band, the system provides robust, interference-resistant transmission with clear audio quality. The bodypack transmitter is designed for easy, secure concealment under clothing and features straightforward controls for power, channel selection, and mute. It is powered by a standard AA battery, offering extended operational life suitable for all-day events or multi-performance theatrical runs.

The included lavalier microphone is an omnidirectional condenser model, optimized for clear speech reproduction and designed to minimize clothing rustle. It connects to the transmitter via a locking 3.5mm mini-jack, ensuring a secure connection that won't dislodge during movement. The system is known for its reliability and ease of use, with features like automatic frequency scanning to find clear channels and an intuitive interface for quick setup. The receiver (not explicitly mentioned in the set name but implied as part of a complete system; the "R" may denote a bundled receiver or regional variant) would typically be a compact, diversity unit offering balanced XLR and unbalanced outputs for connection to cameras, mixers, or recorders.

As a B-Stock item, this wireless lavalier set offers the full technical performance and build quality of a new Sennheiser system but may have minor cosmetic imperfections or come in non-retail packaging. It represents a significant value for videographers, sound engineers, and presenters seeking a reliable, professional-grade wireless solution from a leading audio manufacturer. Whether used for news gathering, corporate presentations, or enhancing video production audio, this set provides the clarity, mobility, and discretion required for professional wireless audio capture.

Key Features

  • Automatic Frequency Management: Automatically and continuously searches for free frequencies, ensuring a stable wireless connection without manual setup.
  • High-Quality Speech Audio: The included professional MKE 1 omnidirectional microphone is optimized for clear speech intelligibility with low ambient noise.
  • Long-Lasting Rechargeable Battery: The BA 30 accupack offers up to 15 hours of continuous operation, with convenient USB recharging.
  • Secure Audio Transmission: Features 256-bit AES encryption to protect confidential audio signals from unauthorized interception.
  • Rackmount Integration: This "-R" version includes a rackmount kit, making it ready for professional installation in standard equipment racks.
  • Easy System Monitoring: The receiver has network integration and is compatible with Sennheiser's Control Cockpit software for remote monitoring and management.

Sennheiser SL LAVALIER SET DW-4-US R Wireless Lavalier Set [B-Stock] Specs

System Configuration
System Type
UHF Wireless Lavalier Set
Frequency Range
UHF 554 - 584 MHz (US Region, DW 4-US band)
Modulation
Wideband FM
Pilot Tone
Yes (for reliable squelch operation)
Transmitter (Bodypack)
Model
SK 4-US (or equivalent DW bodypack)
Battery
1x AA (Alkaline or rechargeable)
Battery Life
Up to 8 hours (typical)
Output Power
Adjustable (10/30/50 mW)
Connector
3.5mm locking for lavalier
Lavalier Microphone
Type
Omnidirectional Electret Condenser
Frequency Response
40 Hz - 18,000 Hz
Sensitivity
-46 dBV/Pa
Cable Length
1.2 m (3.9 ft)
Connector
3.5mm locking mini-plug

Key Features

  • Automatic Frequency Management: Automatically and continuously searches for free frequencies, ensuring a stable wireless connection without manual setup.
  • High-Quality Speech Audio: The included professional MKE 1 omnidirectional microphone is optimized for clear speech intelligibility with low ambient noise.
  • Long-Lasting Rechargeable Battery: The BA 30 accupack offers up to 15 hours of continuous operation, with convenient USB recharging.
  • Secure Audio Transmission: Features 256-bit AES encryption to protect confidential audio signals from unauthorized interception.
  • Rackmount Integration: This "-R" version includes a rackmount kit, making it ready for professional installation in standard equipment racks.
  • Easy System Monitoring: The receiver has network integration and is compatible with Sennheiser's Control Cockpit software for remote monitoring and management.
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