Sennheiser SpeechLine Digital Wireless SL Lavalier Set DW-4-US R Wireless Mic System with Rackmount Kit

The Sennheiser SpeechLine Digital Wireless SL Lavalier Set DW-4-US R is a complete digital wireless lavalier microphone system designed for professional speech applications. Whether you're presenting in a lecture hall, leading a conference, or speaking in a corporate meeting, this system delivers clear, reliable audio with minimal setup required.

This set includes a bodypack transmitter, a rackmount receiver, and the compact, high-performance Sennheiser MKE 1 lavalier microphone. Engineered specifically for spoken word, the system provides outstanding speech intelligibility and is optimized for use in business, education, and public speaking environments.

One of the standout features of this wireless mic system for conferences and presentations is its automatic frequency and interference management. Thanks to bi-directional communication between the transmitter and receiver, the system configures itself without the need for manual adjustments. This ensures stable, interference-free audio at all times, even in challenging RF environments.

The included rechargeable accupack provides up to 15 hours of operating time and can be conveniently charged via USB using the included cable. This makes the system a great choice for long events or back-to-back sessions, without the hassle of constantly replacing batteries.

The system integrates seamlessly with Sennheiser Control Cockpit software, offering a full overview of all network-enabled devices in your setup. You can monitor signal strength, battery levels, and make real-time adjustments remotely, all from a computer, tablet, or smartphone. This is especially helpful in multi-room or multi-speaker environments.

The included SL Bodypack DW-4-US transmitter is lightweight, durable, and intuitive to use. It features a mute slider for easy access during presentations and displays essential status information on its LC screen, including battery life and link quality. The transmitter works with a wide range of Sennheiser lavalier and headset microphones, including the SL Headmic 1 and MKE 1, giving you flexibility to adapt your setup as needed.

The MKE 1 miniature lavalier microphone is Sennheiser’s smallest professional mic, yet it delivers incredibly transparent sound with high speech clarity. Its omnidirectional pickup pattern and Kevlar-reinforced cable make it ideal for broadcast, stage, and conference use. The moisture-resistant design ensures long-lasting performance, even in active or high-stress environments.

The SL Rack Receiver DW-4-US offers a clean and simple setup with an OLED screen that makes navigation easy. With 256-bit AES encryption, your wireless transmission remains secure, and thanks to the receiver’s full network integration, all system settings can be managed via AMX, Crestron, or Sennheiser's Control Cockpit platform. It also includes flexible antenna mounting options and a universal power supply.

The system is powered by the Sennheiser BA 30 rechargeable battery pack, which replaces traditional AA batteries and offers a reliable, environmentally friendly power solution. Built for Sennheiser bodypack transmitters, this battery delivers consistent performance and supports charging via dedicated docking stations or USB.

Whether you're outfitting a single room or managing a campus-wide audio network, the Sennheiser SpeechLine Digital Wireless Lavalier Set gives you the professional tools to deliver flawless speech transmission with ease. Its smart design, network control options, and superior microphone quality make it a trusted choice for serious presenters and AV professionals.