Sennheiser SL Boundary 114-S DW-3 B

Name: Sennheiser SL Boundary 114-S DW-3 B Wireless Table Boundary Microphone
Brand: Sennheiser
SKU: sennheiser-sl-boundary-114-s-dw-3-b-506607
Availability: InStock

Overview

The Sennheiser SL Boundary 114-S DW-3 B is a cable-free table boundary microphone for conference rooms, with a half-cardioid pickup pattern and a condenser capsule. It charges inductively or over USB, shows battery status on dedicated LEDs and works with the SL Rack Receiver DW. A programmable button and a two-colour LED ring make it easy for chairs and presenters to use. It suits boardrooms, government meeting rooms and university seminar spaces in Qatar. Request a quote from SmartRooms Qatar.

A cable-free table microphone for speech in meetings

The SL Boundary 114-S DW-3 B is a wireless table boundary microphone from the SpeechLine Digital Wireless range, built for speech in conference rooms. Its condenser capsule and half-cardioid pickup pattern are aimed at people seated around a table, so voices are picked up from the front while the area behind the unit is less affected. Article number 506607 identifies this exact variant, finished in black.

Specifications that matter in a conference room

The audio chain is specified at 24 bit/48 kHz sampling, an audio frequency response of 40 to 20,000 Hz and a signal-to-noise ratio above 90 dB(A). The dynamic range is listed as below 110 dB(A), and total harmonic distortion is typically 0.1 %. The unit weighs 208 g and is listed at 114 (height), 85 (length) and 30.8 (width).

Battery: one BA 40 rechargeable battery (2.2 Ah, 3.6 V) is included, with a typical operating time of 12 h on the accupack.
Charging: inductive charging on a compatible wireless transmitter, or USB. The CHG 2W wireless charger for two devices is sold separately by the manufacturer.
Control: a programmable microphone button (PTT, PTM, toggle on/off or permanent on) and a two-colour LED ring that signals status.
Monitoring: battery status LEDs, plus remote monitoring and control with the Sennheiser Control Cockpit.

Where it fits in Qatar

A boardroom in West Bay or Msheireb holding a weekly executive meeting benefits from a microphone that sits on the table without trailing cables. A ministry or authority meeting room in Doha running hybrid sessions with colleagues abroad can use the LED ring to see the unit's status at a glance. In a university seminar room in Education City, the permanent-on or toggle setting suits panel discussions where the speaker should not have to hold a button.

Planning the installation

Table boundary microphones perform best when placed according to the room's seating plan, so confirm seat positions and spacing between participants before ordering. The listed operating range is 0 °C to 45 °C with relative humidity up to 95 %. Outdoor temperatures in Qatar can exceed 45 °C in summer, so keep the unit in air-conditioned rooms and away from parked vehicles and sun-exposed areas. The frequency range in the source data is the EU band of 1,880 to 1,900 MHz; have the SmartRooms Qatar team confirm it suits your deployment before quotation.

Multiple units for a school or government building are commonly ordered through an LPO or a government tender, and quotations usually arrive within one working day. SmartRooms Qatar offers free site surveys, delivery to all eight municipalities of Qatar and professional installation. Request a quote for the SL Boundary 114-S DW-3 B and share your room layout and seat count.

Highlights

Half-cardioid pickup pattern suited to table placement
Inductive wireless charging or USB charging
Programmable button: PTT, PTM, toggle or permanent on
Two-colour LED ring and battery status LEDs
Compatible with the SL Rack Receiver DW
Remote monitoring via Sennheiser Control Cockpit
Typical 12 h accupack runtime and 2-year 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

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-3 B24

article_number: 506607
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-3 B

What is the SL Boundary 114-S DW-3 B used for?

It is a wireless table boundary microphone designed for speech in conference rooms. Its half-cardioid pickup pattern captures voices from people seated around a table, and because it runs without cables it can be moved between meetings without leads crossing the table. It suits a boardroom in West Bay or a government committee room in Doha where participants sit around one table.

Which variant is this, and how does it differ from the other SL Boundary 114-S DW models?

This page covers article number 506607, the DW-3 B variant in black. The source data lists its dynamic range as below 110 dB(A) and its typical accupack runtime as 12 h. The other models in the series have their own article numbers and specifications, so check the article number on your quotation before ordering.

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

The unit includes one BA 40 rechargeable battery rated at 2.2 Ah and 3.6 V. The manufacturer lists a typical operating time of 12 h on the accupack. It can be charged inductively on a wireless transmitter or through USB. The CHG 2W wireless charger for two devices is sold separately, so add it to your quotation if you want a dedicated charging station.

Does it work with the SL Rack Receiver DW?

Yes. The SL Boundary 114-S DW-3 B is listed as compatible with the SL Rack Receiver DW, which belongs to the SpeechLine Digital Wireless family. Request the receiver in the same quotation so the system is matched from the start. Because the connection is wireless, no cable needs to run between the table and the equipment rack.

What does the programmable button do during a hybrid meeting in Doha?

The button can be set to PTT, PTM, toggle on/off or permanent on. Choose toggle when a chairperson speaks often, and PTT when participants should only be heard while pressing the button. The two-colour LED ring shows the unit's status to people in the room, which helps during hybrid calls with colleagues abroad.

Can a facilities team in a multi-floor ministry monitor the units remotely?

Yes. The source data states that the unit can be monitored and controlled remotely with the Sennheiser Control Cockpit. This lets a facilities or IT team check the status of several meeting rooms from one place. Ask the SmartRooms Qatar team which network and software requirements apply to your building before purchasing.

Is it suitable for hot or outdoor locations in Qatar?

The listed operating temperature is 0 °C to 45 °C, with relative humidity up to 95 %. Outdoor temperatures in Qatar can go above 45 °C in summer, so keep the unit in air-conditioned rooms and away from parked cars and sun-exposed spaces. If your environment is unusual, confirm the intended use with the SmartRooms Qatar team before quotation.

Is the frequency band suitable for use in Qatar?

The source data lists the EU frequency range as 1,880 to 1,900 MHz. This page does not confirm local regulatory approval for Qatar. Before ordering a set for a ministry or school, ask the SmartRooms Qatar team to verify the frequency band against your deployment and any approval requirements that apply to your project.

Will it capture speech clearly in a lecture room in Education City?

The manufacturer lists an audio frequency response of 40 to 20,000 Hz, a signal-to-noise ratio above 90 dB(A), sensitivity of 10 mV/Pa and typical THD of 0.1 %. These figures support clear speech capture in teaching spaces. Actual results still depend on room acoustics, the number of seats and where the unit is placed on the table.

How should I plan placement on a table in a Msheireb meeting room?

The unit weighs 208 g and is listed at 114 (height), 85 (length) and 30.8 (width). Place it in front of the main speaker positions, away from air-conditioning vents and paper stacks. Start with a seating plan, then request a free site survey from SmartRooms Qatar so the positions are confirmed before installation and units do not need to be moved afterwards.

Can we buy several units for a school or government building?

Yes. Quotations for multiple units are usually issued within one working day. Schools and government bodies can order against a purchase order (LPO) or through government tenders, including Monaqasat. Payment can be made by bank transfer, cheque or purchase order. Send the number of rooms and seats so the quotation includes the correct number of microphones and receivers.

What warranty applies to this model?

The manufacturer's data lists a warranty of 2 years for this model, and SmartRooms Qatar supplies it under the manufacturer's warranty. Because warranty conditions are set by the manufacturer, ask for the terms in writing with your quotation. This is especially useful for government projects that need clear documentation for a tender file.