Sennheiser SL Boundary Set DW-4 US

Name: Sennheiser SL Boundary Set DW-4 US Wireless Boundary Microphone Set
Brand: Sennheiser
SKU: sennheiser-sl-boundary-set-dw-4-us-506630
Availability: InStock

Overview

The Sennheiser SL Boundary Set DW-4 US is a cable-free table microphone kit for conference rooms. It pairs an SL Boundary 114-S DW condenser microphone with an SL Rack Receiver DW, operating across a 1920.000 to 1930.000 frequency range. Cardioid and half-cardioid pickup, a battery with a typical runtime of 13 hours and inductive charging suit boardrooms and meeting rooms across Doha.

What the DW-4 US kit contains

The SL Boundary Set DW-4 US, article number 506630, is a wireless table microphone kit built around the SL Boundary 114-S DW, a condenser boundary microphone meant to sit on a conference table and capture speech without a cable run to the room's audio system. The kit also includes an SL Rack Receiver DW with power supply, a GA 4 rack mount kit, a BA 40 rechargeable battery, a USB cable and a quick guide.

Frequency band, pickup and audio figures

This model is listed with a frequency range of 1920.000 to 1930.000. That band is the first detail to check when comparing it with other members of the SpeechLine DW boundary family, and it should be confirmed for your use in Qatar before a quotation is finalised. The microphone's audio figures are:

Cardioid and half-cardioid pickup patterns
Signal-to-noise ratio above 90 dB(A)
Audio frequency response of 40 to 20,000 Hz
Sampling rate of 24 bit/48 kHz and typical total harmonic distortion of 0.1 %

Cardioid pickup favours sound from the front of the capsule, so placing the microphone in front of the main talkers matters more than the total number of seats around the table.

Charging, battery life and remote management

The SL Boundary 114-S DW can be charged inductively or through USB. Its rechargeable pack is rated at 2.2 Ah and 3.6 V, with a typical operating time of 13 hours. Dedicated battery status LEDs show the remaining charge, so a room coordinator can see at a glance which unit needs attention. The CHG 2W wireless power transmitter, which charges two mobile devices, is available separately and is not included. All devices can be monitored and controlled remotely with the Sennheiser Control Cockpit.

Where it fits in Qatar

Boardroom in West Bay: a table used for hybrid meetings with colleagues in other offices or abroad, where a clear table and fewer cables help the room look and work well.
Seminar room in Education City: a discussion space where presenters move between seats, so a cable-free microphone avoids trailing leads across the table.
Ministry or agency meeting room in Doha: formal meetings held around one table, where discreet placement and a clean layout are the priority.

What to plan before installation

The rack receiver is designed to be rack mounted, so choose a location near a rack or cabinet with access to power. The data available does not list the input voltage of the power supply or an operating temperature range. Before installation, confirm with the SmartRooms Qatar team that the supply suits Qatar mains of 240 V and 50 Hz with BS 1363 sockets, and confirm the environment before placing the receiver in an area that is not air-conditioned. Free site surveys are available before installation, which helps decide microphone positions and receiver location. The manufacturer warranty on this set is two years.

To request a quotation for the SL Boundary Set DW-4 US, send your room dimensions, the number of microphone sets needed and the intended frequency band. The SmartRooms Qatar team usually responds within one working day, and public bodies can issue an LPO or submit through Monaqasat.

Highlights

Condenser SL Boundary 114-S DW microphone with SL Rack Receiver DW
Frequency range listed as 1920.000 to 1930.000
Cardioid and half-cardioid pickup pattern
Battery typically runs 13 hours; inductive or USB charging
Battery status LEDs and remote control via Sennheiser Control Cockpit
Two-year manufacturer warranty

Room fit

Tell us the room size and platform (Teams, Zoom or BYOD) and we confirm the right combination with your quotation.

Estimated timeline

Quotation within 1 working day · delivery timing depends on stock availability, and we confirm it with your quotation.

Specifications

42 specifications · Source: manufacturer · checked Oct 2026

Logistics1

Warranty (years): 2

Product2

Transducer type: Condenser
Total harmonic distortion (THD): typ. 0.1 %

Frequency Specifications2

Frequency range: 1880.000 - 1900.000
Audio frequency response: 40 to 20,000 Hz

Acoustic Properties4

Dynamic range (>): < 100 dB(A)
Sampling rates: 24 bit/48 kHz
Signal-to-noise ratio: > 90 dB(A)
Pickup pattern: Cardioid, Half cardioid

Connectivity1

Connection: Wireless

Battery & Power5

Battery capacity (Ah): 2.2
Battery count: 1
Battery included: Y
Battery voltage (V): 3.6
Battery operating time (h): Battery pack: typ. 13 h

Electrical Properties1

Microphone sensitivity: 10 mV / PA

Dimensions4

Product weight (g): 208
Product height: 73
Product length: 405
Product width: 350

SL Boundary Set DW-4 US22

article_number: 506630
specs · Logistics · Warranty (years): 2
specs · Product · Transducer type: Condenser
specs · Product · Total harmonic distortion (THD): typ. 0.1 %
specs · Frequency Specifications · Frequency range: 1920.000 - 1930.000
specs · Frequency Specifications · Audio frequency response: 40 to 20,000 Hz
specs · Acoustic Properties · Dynamic range (>): < 100 dB(A)
specs · Acoustic Properties · Sampling rates: 24 bit/48 kHz
specs · Acoustic Properties · Signal-to-noise ratio: > 90 dB(A)
specs · Acoustic Properties · Pickup pattern: Cardioid, Half cardioid
specs · Connectivity · Connection: Wireless
specs · Battery & Power · Battery capacity (Ah): 2.2
specs · Battery & Power · Battery count: 1
specs · Battery & Power · Battery included: Y
specs · Battery & Power · Battery voltage (V): 3.6
specs · Battery & Power · Battery operating time (h): Battery pack: typ. 13 h
specs · Electrical Properties · Microphone sensitivity: 10 mV / PA
specs · Dimensions · Product weight (g): 208
specs · Dimensions · Product height: 73
specs · Dimensions · Product length: 405
specs · Dimensions · Product width: 350
in_the_box: (1) SL Boundary 114-S DW Table boundary microphone · (1) SL Rack Receiver DW incl. power supply · (1) USB cable · (1) BA 40 Rechargeable battery · (1) GA 4 Rack mount kit · (1) Quick guide

Downloads

0 files from the manufacturer

No downloadable files are listed for this model yet. Ask us and we will send the datasheet.

Questions about SL Boundary Set DW-4 US

What is the Sennheiser SL Boundary Set DW-4 US used for?

It is a cable-free table microphone kit for conference rooms. It combines an SL Boundary 114-S DW condenser boundary microphone with an SL Rack Receiver DW, so speech from the middle of a table reaches the room audio system without a cable crossing the table. It suits meetings where people join from abroad and the table needs to stay clear.

Which frequency range does the DW-4 US variant use?

The manufacturer lists a frequency range of 1920.000 to 1930.000 for this model. Other variants in the same family list different ranges, so check this figure against the variant you need before ordering. Ask the SmartRooms Qatar team to confirm that the band suits your planned use in Qatar before a quotation is issued.

What is included in the box, and does the receiver mount in a rack?

The set includes the SL Boundary 114-S DW table microphone, the SL Rack Receiver DW with power supply, a BA 40 rechargeable battery, a USB cable, a GA 4 rack mount kit and a quick guide. The receiver can be rack mounted using the included kit, so reserve a rack location with access to a power outlet and a clear route for the microphone cable to the table.

How is the microphone charged, and how long does the battery last?

The SL Boundary 114-S DW charges inductively or through USB, and its rechargeable pack is rated at 2.2 Ah and 3.6 V. The typical operating time is 13 hours. Dedicated battery status LEDs show the remaining charge. The CHG 2W wireless power transmitter is available separately and is not included in the set.

What pickup pattern does the microphone use, and where should it sit?

The microphone uses cardioid and half-cardioid pickup patterns. A cardioid pattern favours sound from the front, so place the microphone in front of the main speakers rather than at the far end of the table. The signal-to-noise ratio is above 90 dB(A), and the audio frequency response runs from 40 to 20,000 Hz.

Does the SL Rack Receiver DW include a power supply, and will it work with Qatar mains?

Yes, the SL Rack Receiver DW is supplied with its power supply. The source data does not list the input voltage, so do not assume compatibility. Before installation, confirm with the SmartRooms Qatar team that the supply matches Qatar mains of 240 V and 50 Hz and that the sockets are BS 1363 (Type G).

Can the set be monitored or controlled remotely?

Yes. Each device in the set can be monitored and controlled remotely with the Sennheiser Control Cockpit. The manufacturer data does not list network requirements or the number of supported devices, so ask your IT team to review these details with the SmartRooms Qatar team before planning the network connection.

Is this set suitable for a boardroom in West Bay used for hybrid meetings?

Yes, if the boardroom table is the main speaking position and teams join from other offices or abroad. The microphone sits on the table and the rack receiver can be placed in a comms cabinet, so cables do not cross the table. Arrange a free site survey first to confirm the table position, receiver location and frequency band before the quotation is confirmed.

Would a seminar room in Education City benefit from this kit?

It suits seminar rooms where a presenter or panel sits at a table and moves between seats. The cable-free microphone keeps the table clear for laptops and papers. For a large lecture theatre with a lectern and tiered seating, confirm with the SmartRooms Qatar team whether a table set is the right choice, because this kit is designed for table use.

Could a hotel conference room in Lusail use the DW-4 US?

Yes, a hotel or serviced apartment meeting room in Lusail can use this set when event organisers want a clean table layout without cable runs. Hotel room layouts change often, so plan the rack or cabinet location in advance. Ask for a quotation that lists every item in the box so the event team knows exactly what is being installed.

Is it practical for a government meeting room in Msheireb?

Formal government meetings usually take place around one table, and a cable-free microphone helps keep that layout clear. Public-sector buyers often work through purchase orders or tenders, and SmartRooms Qatar can provide quotations to support LPO and Monaqasat processes. Confirm the frequency band with your procurement and technical teams before submitting the requirement.

Would a private school in Al Rayyan use this for staff or parent meetings?

It fits staff meeting rooms and parent-teacher meeting rooms better than a large assembly hall, because it is built for table use. A school ordering several sets for different meeting rooms can request one quotation covering every unit and pay by purchase order. Plan a site survey so each room's receiver location and power outlet are confirmed before installation.