Sennheiser SL Rack Receiver DW-3-AU

Name: Sennheiser SL Rack Receiver DW-3-AU Half 19-inch Wireless Receiver
Brand: Sennheiser
SKU: sennheiser-sl-rack-receiver-dw-3-au-506164
Availability: InStock

Overview

The Sennheiser SL Rack Receiver DW-3-AU is a stationary half-width receiver for the SpeechLine Digital Wireless system, listed for the 1880.000 - 1900.000 frequency range. It offers 19 ms latency, 24 bit/48 kHz audio, an OLED screen, XLR and RCA outputs and network control. It suits conference rooms, lecture theatres and halls in Qatar that run wireless microphones.

What the SL Rack Receiver DW-3-AU does

The SL Rack Receiver DW-3-AU is the receiving unit of the SpeechLine Digital Wireless system. It is a stationary, half-width receiver built for a 19-inch equipment rack. It picks up the signal from wireless microphone transmitters and passes the audio to a mixer, amplifier, recorder or conferencing system, so it stays in one place as the fixed heart of a wireless microphone installation.

The listed dimensions are 405 (length), 274 (width) and 73 (height), and the unit weighs 828 g. The box includes the receiver, one power supply and two antennas.

Audio and latency figures to check

Latency is listed at 19 ms, a short delay that keeps a speaker in step with the room when the voice is reinforced through loudspeakers. The signal-to-noise ratio is above 90 dB(A) and the dynamic range above 120 dB(A). Audio is sampled at 24 bit/48 kHz with a listed response of 20 to 20,000 Hz, total harmonic distortion is typically 0.1 %, and RF sensitivity is below -90 dBm.

The outputs are one XLR 3M audio output and two RCA outputs, so installers can match the connection to a mixing desk or playback device. The RJ45 network port supports Ethernet with IPv4 and IPv6, and the receiver can be controlled through AMX or Crestron media control protocols or the dedicated Sennheiser iOS apps.

Pairing, control and security

Pairing is designed to be quick, and once linked the transmitter and receiver stay securely connected. Bi-directional communication lets operators adjust the settings of paired transmitters from the receiver, and the OLED display shows setup and status on the unit itself. Automatic frequency and interference management supports dependable operation in busy rooms, and 256 bit AES encryption protects the wireless audio.

Where it fits in Qatar

A ministry boardroom in Msheireb: wireless lectern or table microphones feed the room's existing sound system, the rack sits in the comms cabinet, and the AV team checks status over the network.

A university lecture theatre in Education City: a lecturer walks the floor with a wireless transmitter, and the 19 ms latency and 24 bit/48 kHz audio keep speech clear at the back of the hall.

A hotel ballroom in West Bay or Lusail: the receiver stays in a back-of-house AV room while the speaker moves between stage and floor during conferences and gala dinners.

Planning the installation

Allow half-width rack space for the unit and room for the two antennas. They can be mounted at the back or front of the receiver, and extension cables for wall mounting are available. A free site survey from SmartRooms Qatar lets the team check the room layout and antenna positions before installation.

The listed operating temperature runs from -10 °C to +55 °C with humidity up to 95 %, but Qatar summer temperatures can exceed 45 °C. Keep the rack in a cooled, ventilated, dust-controlled room rather than an unventilated cupboard. Confirm the power supply's voltage and plug type before ordering, because the source data does not state them for this variant, and Qatar mains runs at 240 V, 50 Hz with BS 1363 sockets. Also confirm with the SmartRooms Qatar team that the 1880.000 - 1900.000 band suits your site.

What is included and how to order

The manufacturer lists a five-year warranty for this model, and products are covered by the manufacturer's warranty. Transmitters are not listed in the box, so state how many you need and which ones you have when you request a quote. SmartRooms Qatar supplies the product, delivers to all eight municipalities of Qatar, offers professional installation, and accepts purchase orders and government tenders, including Monaqasat. Lead times are confirmed in your quotation. Request a quote to plan your SL Rack Receiver DW-3-AU installation.

Highlights

Half 19-inch stationary rack receiver for SpeechLine Digital Wireless systems
Frequency range listed as 1880.000 - 1900.000
19 ms latency and signal-to-noise ratio above 90 dB(A)
24 bit/48 kHz sampling with 20 to 20,000 Hz listed response
Ethernet with IPv4 and IPv6, plus AMX and Crestron control
Five-year manufacturer warranty listed for this model

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-3-AU21

article_number: 506164
specs · Logistics · Warranty (years): 5
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: 1880.000 - 1900.000
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-3-AU

Who is the SL Rack Receiver DW-3-AU for?

It suits organisations that run fixed wireless microphones in conference and meeting rooms, such as a ministry boardroom in Msheireb that wants speakers heard through its existing sound system. The unit mounts in a 19-inch rack in a comms room and works with transmitters from the SpeechLine Digital Wireless system. Request a quote that lists the transmitters you need.

What frequency range does it operate in?

The specification sheet lists a frequency range of 1880.000 - 1900.000 for this model, with no unit given in the source data, so confirm the band with the SmartRooms Qatar team before ordering. Transmitters in your system must work within the same band to pair with the receiver. Other models in this family list different ranges, so check the exact model number when you request a quote.

How much latency does it add to the audio?

The listed latency is 19 ms. In a lecture theatre in Education City or a school assembly hall, that short delay keeps a speaker's voice in step with the room when it is reinforced through loudspeakers. The receiver also lists a signal-to-noise ratio above 90 dB(A) and 24 bit/48 kHz sampling, both of which help speech stay clear over background noise.

Can the receiver be controlled over the network?

Yes. The RJ45 port provides Ethernet with IPv4 and IPv6, and settings and status are accessible through AMX and Crestron media control integration as well as the dedicated Sennheiser iOS apps. An AV team in a control room in Doha can check the receiver without walking to the comms cabinet. Confirm your control system before ordering so the integration plan matches it.

How are transmitters paired with the receiver?

The pairing process is designed to be quick, and once linked the transmitter and receiver stay securely connected. Bi-directional communication lets you adjust a paired transmitter's settings from the receiver side without handling each microphone. Automatic frequency and interference management supports reliable operation. The box does not include transmitters, so state the number and type you need when requesting a quote.

Where do the antennas go, and does the unit fit a standard rack?

The unit is a half 19-inch stationary receiver, so it occupies half the width of a standard rack shelf. Its two antennas can be mounted at the back or the front, and extension cables for wall mounting are available. Plan the cable route before installation so the antenna positions suit the room layout. A free site survey from SmartRooms Qatar helps confirm this.

Is it suitable for a hotel ballroom in West Bay or Lusail?

A ballroom suits a stationary receiver placed in a back-of-house AV room, while the wireless speaker moves between stage and floor. The 19 ms latency and the listed 20 to 20,000 Hz response suit speeches and presentations. Ask the team how many receivers and transmitters your room layout needs, and whether the 1880.000 - 1900.000 band suits your venue.

Can it stay in a comms room during Qatar summers?

The listed operating temperature range is -10 °C to +55 °C, with humidity up to 95 %. Qatar summer temperatures can exceed 45 °C, so a school hall in Al Rayyan should keep the rack in a cooled, ventilated, dust-controlled room rather than a hot corridor cupboard. Confirm the final environment with the SmartRooms Qatar team during the site survey.

Which power supply does it need, and does it fit Qatar sockets?

The unit comes with one power supply, but the source data does not state its voltage or plug type for this variant. Qatar mains runs at 240 V, 50 Hz with BS 1363 (Type G) sockets. Ask the SmartRooms Qatar team to confirm the supply's rating and plug before ordering so installation is not delayed. Quotations usually come within one working day.

What is in the box, and what is the warranty?

The box contains the receiver, one power supply and two antennas. The receiver is supplied without a battery, and transmitters are not listed in the box. The manufacturer lists a five-year warranty for this model, and products are covered by the manufacturer's warranty. Request a quote to confirm the transmitter line-up and the warranty terms that apply to your order.

Can a ministry or school order it through an LPO or government tender?

Yes. SmartRooms Qatar accepts purchase orders (LPOs) and government tenders, including Monaqasat, and payment can be made by bank transfer, cheque or purchase order. A school equipping several rooms can raise one LPO covering the receiver and its transmitters. Ask for a quotation that lists the receiver, transmitters and antennas so the purchase order matches it.

Can the receiver move between stadium or event venues for hire?

It is a stationary rack receiver designed for fixed installation, not a portable unit, so it suits a permanent comms room better than a hire fleet that travels between venues. If a stadium or event venue in Doha needs mobile wireless audio, describe the setup when you request a quote so the team can suggest a suitable configuration before you buy.