Sennheiser SL Rack Receiver DW-4-EU

Name: Sennheiser SL Rack Receiver DW-4-EU Wireless Microphone Receiver
Brand: Sennheiser
SKU: sennheiser-sl-rack-receiver-dw-4-eu-506171
Availability: InStock

Overview

The Sennheiser SL Rack Receiver DW-4-EU is the 19-inch rack receiver for the SpeechLine Digital Wireless system. Its OLED display helps staff set up and check the system, and transmitter settings can be changed from the receiver. With 19 ms latency, Ethernet control and AES 256-bit encryption, it suits meeting rooms and lecture halls in Doha and Education City that need dependable wireless speech pickup. Request a quote today.

What the SL Rack Receiver DW-4-EU does in a SpeechLine system

The SL Rack Receiver DW-4-EU is the fixed receiving unit of Sennheiser's SpeechLine Digital Wireless system. It is a half-width unit that mounts in a 19-inch equipment rack, picks up the signal from wireless transmitters and passes the audio on through an XLR output and two RCA outputs. Because the receiver stays in the AV cabinet while the transmitters travel with presenters, it is the part of the system that gets integrated with your mixer, amplifier, recording or streaming chain.

Specifications that shape the result

The figures below come from the manufacturer's data for this exact model and help you judge how the receiver will sit in your audio chain.

Latency: 19 ms, a short delay that matters when speech is reinforced through loudspeakers.
Signal-to-noise ratio: above 90 dB(A), with dynamic range above 120 dB(A).
Sampling: 24-bit/48 kHz audio.
Audio frequency response: 20 Hz to 20 kHz.
RF sensitivity: below -90 dBm, with typical total harmonic distortion of 0.1 %.
Encryption: 256-bit AES built in.
Ambient operation: -10 °C to +55 °C and up to 95 % relative humidity.

The data lists power consumption of 350 mA. The unit ships with a power supply and two antennas, so it is ready for its rack position once the mains feed has been confirmed.

Setup, control and network integration

A clear OLED display gives operators a direct view of settings and status at the receiver. Pairing a transmitter is a straightforward process, and bi-directional communication means transmitter settings can be changed from the receiver without handling each microphone. Automatic frequency and interference management works in the background to keep reception stable.

For network control, the receiver offers Ethernet over RJ45 with IPv4 and IPv6 support. Its settings and statuses can be reached through the AMX and Crestron media control protocols or Sennheiser's iOS apps, and the unit can be remote controlled. A third-party API is listed for integrators.

Where it fits in Qatar

Three situations where this receiver makes sense:

A boardroom refit in West Bay: the receiver sits in the AV cabinet of a meeting room, and wireless transmitters pick up speakers for hybrid calls with teams abroad.
A lecture hall in Education City: lecturers and guest speakers move around the stage, while the receiver in the room's equipment rack feeds the sound system and recording equipment.
A ballroom in Lusail: a hotel hosting bilingual conferences can use the network connection so the events team checks and adjusts the receiver from the control point.

What to plan before you order

Plan rack space for a half-width unit and leave room for the antenna position you choose, back or front mounted, with extension cables available for wall mounting. In Qatar a comms cabinet can become hot in summer, so keep airflow around the receiver; its rated ambient range is -10 °C to +55 °C. Confirm the power supply's input rating against Qatar's 240 V, 50 Hz supply before connecting, because that rating is not part of the data for this model. The operating frequency band for this exact variant is also not listed, so the team will confirm it against your transmitters during a free site survey.

Share your room layout, the number of transmitters and the control system you use, and SmartRooms Qatar will prepare a quotation for the DW-4-EU. Purchase orders and government tenders are accepted, with payment by bank transfer, cheque or purchase order.

Highlights

19 ms latency
Signal-to-noise ratio above 90 dB(A)
OLED display with bi-directional transmitter control
Ethernet RJ45 with IPv4 and IPv6 support
AMX and Crestron media control integration
256-bit AES encryption and 24-bit/48 kHz audio

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

36 specifications · Source: manufacturer · checked Oct 2026

Logistics1

Warranty (years): 5

Product3

Latency (ms): 19 ms
Total harmonic distortion (THD): typ. 0.1 %
RF sensitivity: < -90 dBm

Frequency Specifications2

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

Acoustic Properties3

Dynamic range (>): > 120 dB(A)
Sampling rates: 24 bit/48 kHz
Signal-to-noise ratio: > 90 dB(A)

Connectivity2

Connection ports: Audio Out: XLR 3M Audio Out: 2 x RCA Network: RJ 45
Connection: Wireless

Ambient Conditions2

Operating relative humidity (≤ %): max. 95 %
Operating temperature (C): –10 °C to +55 °C (14 °F to 131 °F)

Battery & Power2

Battery included: N
Power consumption (Amp): 350 mA

Dimensions4

Product weight (g): 828
Product height: 73
Product length: 405
Product width: 274

SL Rack Receiver DW-4-EU17

article_number: 506171
specs · Product · Transducer type: Dynamic, Permanently-polarized condenser
specs · Product · Latency (ms): 19 ms
specs · Product · Total harmonic distortion (THD): typ. 0.1 %
specs · Product · RF sensitivity: < -90 dBm
specs · Frequency Specifications · Audio frequency response: 20 to 20,000 Hz
specs · Acoustic Properties · Dynamic range (>): > 120 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: Supercardioid, Cardioid
specs · Connectivity · Connection ports: Audio Out: XLR 3M Audio Out: 2 x RCA Network: RJ 45
specs · Connectivity · Connection: Wireless
specs · Ambient Conditions · Operating relative humidity (≤ %): max. 95 %
specs · Ambient Conditions · Operating temperature (C): –10 °C to +55 °C (14 °F to 131 °F)
specs · Battery & Power · Power consumption (Amp): 350 mA
specs · Dimensions · Product weight (g): 828
in_the_box: (1) SL Receiver DW Rack receiver · (1) Power supply · (2) Antennas

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 Rack Receiver DW-4-EU

What is the Sennheiser SL Rack Receiver DW-4-EU used for?

It is the fixed receiver for Sennheiser's SpeechLine Digital Wireless system. It mounts in a half-width slot of a 19-inch rack, receives audio from wireless transmitters and sends it to a mixer, amplifier or recording device through XLR and RCA outputs. It suits meeting rooms, lecture halls and conference spaces where presenters need wireless speech pickup while the AV equipment stays in a cabinet.

What comes in the box with the DW-4-EU?

The box contains one SL Receiver DW rack receiver, one power supply and two antennas. Transmitters are not in the box, so list the transmitters you already own or plan to buy when you request a quote. The unit has no battery and runs from its power supply, which is why the input rating should be checked against Qatar's 240 V, 50 Hz mains before installation.

What audio quality and latency does the receiver deliver?

The data lists 19 ms latency, a signal-to-noise ratio above 90 dB(A), dynamic range above 120 dB(A) and 24-bit/48 kHz sampling. Audio frequency response is 20 Hz to 20 kHz, and total harmonic distortion is typically 0.1 %. RF sensitivity is better than -90 dBm. For a room that combines amplified speech with live recording, these figures point to a low-noise, low-delay signal path.

Can the receiver be controlled over the network or from a control system?

Yes. The DW-4-EU has an RJ45 Ethernet port supporting IPv4 and IPv6. Settings and status can be accessed through the AMX and Crestron media control protocols and Sennheiser's iOS apps, and the unit is remote controllable. A third-party API is available for integrators. If your room already runs an AMX or Crestron system, the receiver can be included in the same control project after the site survey.

How is a wireless transmitter paired with the receiver?

The receiver's OLED display guides setup and day-to-day checks. The manufacturer describes a quick, easy pairing process that securely links a transmitter to its receiver. Because communication is bi-directional, transmitter settings can be adjusted from the receiver side after pairing. Detailed pairing steps are in the SpeechLine Digital Wireless instruction manual, which is the reference to follow during commissioning.

Our boardroom in West Bay is being refitted. Will the receiver fit an existing rack?

The DW-4-EU is a half-width 19-inch rack unit, so it needs a half-width position rather than a full-width one. Its antennas can be mounted at the back or front, and extension cables for wall mounting are available, which helps when the rack sits in a cabinet with limited space. Before ordering, SmartRooms Qatar offers a free site survey to measure the rack, check cable runs and confirm antenna placement.

Will the receiver cope with Qatar's summer heat in a comms cabinet?

The rated operating temperature is -10 °C to +55 °C, with relative humidity up to 95 %. In Doha, the air inside a closed, unventilated cabinet can approach that limit on a summer afternoon, especially with amplifiers and other AV equipment adding heat. Plan for airflow through the rack, a cabinet fan or a air-conditioned comms room, and ask the team to review the installation location during the site survey.

Which frequency band does this model use, and will it work with my transmitters?

The frequency range for this exact variant is not listed in the manufacturer data available for this page, so the band cannot be confirmed from the specifications alone. SmartRooms Qatar will check the band and the compatibility of the transmitters you own or plan to buy before preparing the quotation. Please give the transmitter model names when you request a quote so the check is completed before ordering.

How does the -EU variant differ from the -US, -UK and -AU versions?

The variants share the same SpeechLine rack receiver design but carry different regional suffixes and article numbers. This page covers only the DW-4-EU, article number 506171. The manufacturer data lists different frequency bands across variants, so do not assume a sibling model's band applies here. Tell the SmartRooms Qatar team which variant you already have, and it will confirm compatibility before you buy.

We are equipping a ballroom in Lusail for bilingual conferences. Why is this receiver suitable?

A ballroom hosting Arabic and English sessions needs clear speech from several wireless microphones, and the low noise figures and 24-bit/48 kHz sampling suit that use. Network control lets the events team check and adjust the receiver from a control point instead of climbing to the rack. Confirm the number of transmitters and the room's frequency plan first, because the band for this model is not stated in the data.

Our university lecture hall in Education City has lapel microphones and a rack. Is this the right receiver?

For a hall where lecturers move across a stage, a rack-mounted receiver with a clear OLED display and an XLR output suits a fixed AV cabinet. The 19 ms latency keeps the signal path short, and the RCA outputs give flexibility for connecting recording equipment. Share the number of lapel transmitters and your existing sound system during the site survey so the team can confirm the match before preparing the quotation.

Can a government ministry buy the DW-4-EU through a purchase order or tender?

Yes. SmartRooms Qatar accepts purchase orders (LPOs) and government tenders, including those published on Monaqasat, and accepts payment by bank transfer, cheque or purchase order. A ministry conference hall or hearing room usually needs a written specification, so include the rack location, the number of transmitters and any control integration in your request. Quotations are usually issued within one working day.