Sennheiser SL Boundary 114-S DW-4 B

Name: Sennheiser SL Boundary 114-S DW-4 B Wireless Table Boundary Microphone
Brand: Sennheiser
SKU: sennheiser-sl-boundary-114-s-dw-4-b-506623
Availability: InStock

Overview

The Sennheiser SL Boundary 114-S DW-4 B (article 506623) is a wireless table boundary microphone from the SpeechLine Digital Wireless range, built to capture speech in conference rooms. Its half-cardioid pickup, programmable microphone button and two-colour LED status ring suit boardrooms and meeting rooms where cables across the table are impractical. It charges wirelessly or over USB and works with the SL Rack Receiver DW.

What the SL Boundary 114-S DW-4 B is

The SL Boundary 114-S DW-4 B, article 506623, is a wireless table boundary microphone from Sennheiser's SpeechLine Digital Wireless family. It is built to pick up voices around a conference table without a cable running to the audio system, so the table layout does not have to follow the route of a cable. The DW-4 suffix and article number 506623 identify this exact variant, and the figures on this page apply to it.

Pickup, audio performance and battery life

The microphone uses a condenser transducer with a half-cardioid pickup pattern, which directs its sensitivity toward people seated at the table. Manufacturer figures list a signal-to-noise ratio above 90 dB(A), a dynamic range below 110 dB(A), 24-bit/48 kHz sampling and an audio frequency response of 40 to 20,000 Hz. Total harmonic distortion is typically 0.1 %. Power comes from a BA 40 rechargeable battery rated at 2.2 Ah and 3.6 V, which is included in the box, with a typical accupack operating time of 12 hours.

Controls, charging and receiver integration

The programmable microphone button can be set to push-to-talk, push-to-mute, toggle on/off or permanent on, so the same unit can suit a chair who speaks often or a panel where the microphone should stay live. A two-colour LED ring shows the microphone status, and dedicated battery status LEDs show the charge level. Charging is either inductive, using the CHG 2W wireless power transmitter that serves two mobile devices and is sold separately, or by USB. The microphone is compatible with the SL Rack Receiver DW, and the Sennheiser Control Cockpit allows remote monitoring and control.

Where it fits in Qatar

A boardroom in West Bay where a senior team meets colleagues abroad, keeping the table clear of cables for documents and laptops.
A university seminar room in Education City, where a lecturer or panel moves around the table and the microphone stays in reach without a trailing lead.
A government authority meeting room in Msheireb, where discussions switch between Arabic and English and seats change during the session.

Its battery and charging options make it practical for shared meeting rooms in Lusail or The Pearl that run back-to-back sessions, provided the charging routine is planned from the start.

What to plan before you order

Confirm the environment. The rated operating range is 0 to 45 °C with up to 95 % relative humidity. Summer temperatures in Qatar can pass 45 °C, so keep the microphone in air-conditioned rooms, away from direct sun through windows.
Check the frequency band. The source data lists EU 1,880 to 1,900 MHz, so confirm with the SmartRooms Qatar team that this band suits your building before ordering.
Plan a charging point near the storage location, so the battery is full before the next meeting.
Plan receiver placement if the microphone feeds an SL Rack Receiver DW system.
The product is covered by a 2-year manufacturer warranty.

Send us your room plan and seat count, and SmartRooms Qatar will return a quotation, usually within one working day. Request a quote for the SL Boundary 114-S DW-4 B and we will confirm the configuration for your rooms.

Highlights

Half-cardioid pickup pattern for speech in conference rooms
Programmable button: push-to-talk, push-to-mute, toggle or permanent on
Two-colour LED ring shows microphone status
Inductive wireless charging or USB charging
Compatible with SL Rack Receiver DW and Sennheiser Control Cockpit
2-year manufacturer warranty; operating range 0 to 45 °C

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

46 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: EU: 1,880 to 1,900 MHz
Audio frequency response: 40 to 20,000 Hz

Acoustic Properties4

Dynamic range (>): < 110 dB(A)
Sampling rates: 24 bit/48 kHz
Signal-to-noise ratio: > 90 dB(A)
Pickup pattern: Cardioid, Half cardioid

Connectivity1

Connection: Wireless

Ambient Conditions2

Operating relative humidity (≤ %): max. 95 %
Operating temperature (C): 0 °C to 45 °C (50 °F to 113 °F)

Battery & Power5

Battery capacity (Ah): 2.2
Battery count: 1
Battery included: Y
Battery voltage (V): 3.6
Battery operating time (h): Accupack: typ. 12 h

Electrical Properties1

Microphone sensitivity: 10 mV / PA

Dimensions4

Product weight (g): 208
Product height: 114
Product length: 85
Product width: 30.8

SL Boundary 114-S DW-4 B24

article_number: 506623
specs · Logistics · Warranty (years): 2
specs · Product · Transducer type: Condenser
specs · Product · Total harmonic distortion (THD): typ. 0.1 %
specs · Frequency Specifications · Frequency range: EU: 1,880 to 1,900 MHz
specs · Frequency Specifications · Audio frequency response: 40 to 20,000 Hz
specs · Acoustic Properties · Dynamic range (>): < 110 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 · Ambient Conditions · Operating relative humidity (≤ %): max. 95 %
specs · Ambient Conditions · Operating temperature (C): 0 °C to 45 °C (50 °F to 113 °F)
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): Accupack: typ. 12 h
specs · Electrical Properties · Microphone sensitivity: 10 mV / PA
specs · Dimensions · Product weight (g): 208
specs · Dimensions · Product height: 114
specs · Dimensions · Product length: 85
specs · Dimensions · Product width: 30.8
in_the_box: (1) SL Boundary 114-S DW Table boundary microphone · (1) BA 40 Rechargeable battery · (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 114-S DW-4 B

What is the Sennheiser SL Boundary 114-S DW-4 B used for?

It is a wireless table boundary microphone for capturing speech in conference rooms, boardrooms and meeting spaces where running cables across the table is impractical. It uses a half-cardioid pickup pattern with a condenser transducer and belongs to the SpeechLine Digital Wireless family. It suits organisations that hold regular seated meetings and want a clean table without trailing leads.

How is article 506623 different from the other SL Boundary 114-S DW variants?

The DW-4 B suffix and article number 506623 identify this exact model, and the specifications on this page are taken from the data for that article. Other variants carry separate article numbers, so check the number on your quotation before ordering. Our team can confirm the exact variant with you when you request a quote.

Which frequency band does the microphone use?

The manufacturer data lists a frequency range of 1,880 to 1,900 MHz for the EU version. This page does not confirm approval for use in Qatar, so before ordering, ask the SmartRooms Qatar team to check that this band fits the wireless environment of your building. Raising it during the site survey avoids surprises in a multi-room installation.

How long does the battery last between charges?

The microphone ships with a BA 40 rechargeable battery rated at 2.2 Ah and 3.6 V. The manufacturer lists a typical accupack operating time of 12 hours. For a long board session, plan to recharge during breaks or overnight, and keep the charging point close to where the microphone is stored.

Can the microphone be charged without a cable?

Yes. The SL Boundary 114-S DW-4 B uses inductive charging, so it can be charged on a compatible wireless transmitter, or over USB. The CHG 2W wireless power transmitter, which serves two mobile devices, is available separately. Placing a charger where the microphone is stored between meetings keeps the battery ready for the next session.

What do the LED indicators show?

A two-colour LED ring shows the microphone status, and dedicated battery status LEDs show the charge level. The programmable button can be set to push-to-talk, push-to-mute, toggle on/off or permanent on. Choose the button mode before the meeting starts so the chair knows what each LED colour means during the discussion.

Does it work with the SL Rack Receiver DW?

Yes, the SL Boundary 114-S DW-4 B is compatible with the SL Rack Receiver DW from the same SpeechLine Digital Wireless family. This suits rooms where audio is routed to a central rack rather than a standalone device. The box contains only the microphone, battery and quick guide, so confirm the receiver you need when you request a quote.

Can facilities or IT staff monitor it remotely?

Yes. The manufacturer data states that the microphone can be monitored and controlled remotely with the Sennheiser Control Cockpit. This lets an AV or IT team check microphone status across several rooms without walking to each table. The Control Cockpit software is not included in the box, so confirm its requirements with your quotation.

Is it suitable for a boardroom in West Bay with a long table?

It suits a table where all seated participants are within the pickup area of one central microphone. For a long boardroom table in West Bay, the best approach is to plan the number of units during a free site survey, measuring seat count, table length and where the chair sits. Some long tables may need more than one microphone to keep speech clear at both ends.

What about a seminar room at Education City with a moving panel?

For a panel discussion, the permanent-on setting keeps the microphone live while speakers change, and push-to-talk suits a smaller group where each speaker presses the button before talking. Because there is no cable, speakers can move around the table without a trip hazard. Share the seating layout when you request a quote so the placement can be confirmed.

Can it be used in a room with west-facing windows in Al Sadd during summer?

The rated operating range is 0 to 45 °C with up to 95 % relative humidity. Summer temperatures in Qatar can pass 45 °C, so keep the microphone indoors in an air-conditioned room, away from direct sun through windows and away from heat sources. Confirm the room conditions with the SmartRooms Qatar team during the site survey.

Can a school or ministry order several units on a purchase order?

Yes. SmartRooms Qatar accepts purchase orders (LPOs), government tenders including Monaqasat, and payment by bank transfer, cheque or purchase order. Quotations are usually issued within one working day. Give the number of rooms and tables so the quotation lists each microphone, battery and quick guide for every location.