Sennheiser SL Rack Receiver DW-4-US

Name: Sennheiser SL Rack Receiver DW-4-US Half-Rack Wireless Receiver
Brand: Sennheiser
SKU: sennheiser-sl-rack-receiver-dw-4-us-505899
Availability: InStock

Overview

The Sennheiser SL Rack Receiver DW-4-US is a half-width, 19-inch rack receiver for the SpeechLine Digital Wireless System, operating in the 1920.000 - 1930.000 MHz range. It has an OLED display, Ethernet control with IPv4 and IPv6, XLR and RCA audio outputs, and 256-bit AES encryption. It suits lecture halls, conference rooms and boardrooms across Qatar that run wireless microphones into a central audio system. Request a quote from SmartRooms Qatar.

What the SL Rack Receiver DW-4-US does

The SL Rack Receiver DW-4-US is the stationary receiving unit of the SpeechLine Digital Wireless System. It is a half-width 19-inch unit that mounts in an equipment rack beside amplifiers, processors and video hardware. It collects the signal from its paired transmitters and passes audio to a mixer, amplifier or recording system. Its article number is 505899, and the box contains the receiver, a power supply and two antennas.

Setup is handled on the clear OLED display on the front. Because communication is bi-directional, you can adjust the settings of paired mobile transmitters from the receiver rather than walking to each microphone. Pairing is a quick process that securely links a transmitter to this receiver.

Frequency band and reliable operation

This variant operates in the 1920.000 - 1930.000 MHz frequency range. Automatic frequency and interference management keeps operation convenient and reliable, and the receiver specifies an RF sensitivity below -90 dBm. Because the band is specific to this model, confirm with the SmartRooms Qatar team that it suits your site and the number of transmitters you plan to run before ordering.

Audio performance and connectivity

Audio outputs: one XLR 3M and two RCA outputs
Network: RJ45 port with IPv4 and IPv6 support
Audio: 24 bit/48 kHz sampling and 20 to 20,000 Hz frequency response
Latency and noise: 19 ms latency and signal-to-noise ratio above 90 dB(A)

Network integration exposes settings and status through AMX and Crestron media control protocols, and Sennheiser provides dedicated iOS apps for the system. Secure 256 bit AES encryption protects the link. The antennas can be mounted at the back or the front, and extension cables for wall mounting are available.

Where it fits in Qatar

In a university lecture theatre in Education City, the receiver can sit in the rack beside the audio processor, so lecturers use wireless microphones while the cabling stays tidy at the front of house.

In a government ministry boardroom in Msheireb or a conference room in Lusail, technicians can check status and adjust settings over the network from a control system or tablet without entering the rack room.

In a hotel ballroom in West Bay or an event hall near Hamad International Airport, place the receiver in a ventilated rack room. Its operating range is -10 °C to +55 °C with humidity up to 95%, and summer temperatures in Qatar can exceed 45 °C, so airflow around the rack matters.

What to plan before you order

Rack space: 73 mm high, 405 mm long, 274 mm wide, weighing 828 g
Antennas: back or front mounting, with wall-mount extension cables available
Power: no battery included, a power supply is supplied, and current draw is 350 mA
Transmitters are not in the box, so list how many microphones you need

SmartRooms Qatar offers a free site survey to plan antenna positions and rack layout, professional installation, delivery to all eight municipalities of Qatar, and quotations usually within one working day. Purchase orders and government tenders are accepted. Request a quote for the SL Rack Receiver DW-4-US and our team will confirm the details in your quotation.

Highlights

Half-width 19-inch rack receiver for SpeechLine Digital Wireless
Operates in the 1920.000 - 1930.000 MHz frequency range
XLR and dual RCA audio outputs with an RJ45 network port
OLED display with bi-directional control of paired transmitters
AMX and Crestron media control integration over the network
Includes power supply and two antennas; 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

40 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-US21

article_number: 505899
specs · Logistics · Warranty (years): 2
specs · Product · Latency (ms): 19 ms
specs · Product · Total harmonic distortion (THD): typ. 0.1 %
specs · Product · RF sensitivity: < -90 dBm
specs · Frequency Specifications · Frequency range: 1920.000 - 1930.000
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 · 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 · Battery included: N
specs · Battery & Power · Power consumption (Amp): 350 mA
specs · Dimensions · Product weight (g): 828
specs · Dimensions · Product height: 73
specs · Dimensions · Product length: 405
specs · Dimensions · Product width: 274
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-US

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

It is the rack-mounted receiver for the SpeechLine Digital Wireless System. It receives audio from paired transmitters and passes it to a mixer, amplifier or recording system through its XLR or RCA outputs. It suits lecture theatres, conference rooms and boardrooms where wireless microphones feed a central audio system. Its half-width 19-inch design fits a standard equipment rack alongside other AV hardware.

How does this model differ from the other SL Rack Receiver DW variants?

The DW-4-US operates in the 1920.000 - 1930.000 MHz frequency range, which is specific to this variant. Its article number is 505899 and its warranty is 2 years. Other variants use different frequency ranges and regional versions. Before buying transmitters or additional receivers, ask the SmartRooms Qatar team to confirm that the band matches your existing equipment and planned setup.

Are microphones or transmitters included with the receiver?

No. The package contains the SL Receiver DW rack receiver, one power supply and two antennas. Transmitters are not included, so when you request a quote, list how many handheld or body-worn units you need. The receiver is the core of the SpeechLine Digital Wireless System, and the SmartRooms Qatar team can confirm which transmitters pair with this unit as part of your quotation.

Which audio outputs and network port does it have?

It has one XLR 3M audio output, two RCA audio outputs and an RJ45 network port. The network port supports IPv4 and IPv6, so settings and status can be reached from your network. Use the XLR output for a balanced connection to a mixer or digital processor, and the RCA outputs for unbalanced equipment. Plan cable runs in the rack before installation day.

Can the receiver be controlled from a touch panel or tablet?

Yes. Network integration exposes the receiver's settings and status through AMX and Crestron media control protocols, and Sennheiser provides dedicated iOS apps. This suits a government ministry boardroom in Msheireb where AV staff manage several rooms from one control panel. Remote control means a technician can adjust transmitter settings from the receiver side instead of walking to each microphone.

What frequency band does this model use, and will it suit my site?

This variant operates between 1920.000 and 1930.000 MHz. Automatic frequency and interference management helps keep operation reliable. Before ordering, ask SmartRooms Qatar to confirm that the band suits your location and planned transmitter count. Dense radio environments, such as large venues or areas close to busy airport infrastructure, should be checked during the site survey so the setup is planned correctly from the start.

How much rack space does it need and how heavy is it?

The receiver measures 73 mm high, 405 mm long and 274 mm wide, and weighs 828 g. It is designed as a half-width 19-inch unit, so check your rack layout and the depth available behind the front panel before ordering. Leave space at the back for cable connections and antenna placement, since the antennas can be mounted at the back or the front of the unit.

Does the receiver need a battery and what power does it draw?

No battery is included. The receiver draws 350 mA and a power supply is supplied in the box. The product data we hold does not list the input voltage rating of the supplied power supply, so confirm it against your site supply before installation. The SmartRooms Qatar team can check this with you when you request a quote for your project.

Can it operate in the heat of a Qatar equipment room?

The operating temperature range is -10 °C to +55 °C, with relative humidity up to 95%. Summer temperatures in Qatar can exceed 45 °C, so the rack room should be air-conditioned and ventilated, with airflow around the unit. Keep the receiver away from heat sources such as amplifiers stacked directly above it, and confirm the environment with the SmartRooms Qatar team if the rack sits in an area without cooling.

How are the antennas installed?

The two antennas can be mounted at the back or the front of the receiver. Where the antennas need to sit on a wall, extension cables for wall mounting are available. During the free site survey, our team can help choose antenna positions that give a clear path to the microphones in the room, rather than placing them behind metal racks or cabinet doors that may block the signal.

Is this receiver suitable for a university lecture theatre in Education City?

Yes, for a lecture theatre that uses wireless microphones with a central audio system. The receiver specifies 19 ms latency, a 20 to 20,000 Hz frequency response and 24 bit/48 kHz sampling, which suit speech, presentations and lecture recordings. Ask the SmartRooms Qatar team to size the number of transmitters for your lecture theatre and confirm the frequency band for the hall before you order.

What does SmartRooms Qatar provide when I buy this receiver?

We supply the receiver, deliver it to all eight municipalities of Qatar and can install it after a free site survey. Quotations are usually issued within one working day. Purchase orders and government tenders, including Monaqasat, are accepted, and payment can be made by bank transfer, cheque or purchase order. The receiver is covered by the manufacturer's 2-year warranty.