SL Rack Receiver DW-3-UK

What the SL Rack Receiver DW-3-UK does

The Sennheiser SL Rack Receiver DW-3-UK is the receiving unit for the SpeechLine Digital Wireless System. It is a half 19-inch stationary receiver, so it mounts in a standard equipment rack beside other AV hardware. It collects the signal from the system's mobile transmitters and passes audio on to the room's sound equipment. Article number 505892 identifies this model within the SL Rack Receiver DW family.

Setup, control and reliable operation

An OLED display shows the receiver's status and guides setup, so an operator can check the unit at the rack without a laptop. Bi-directional communication lets settings on the mobile transmitters be changed from the receiver side. Automatic frequency and interference management keeps the link steady, and the pairing process joins each transmitter to the receiver quickly.

Network features matter where a central control system runs the room. The receiver supports Ethernet with IPv4 and IPv6, accepts remote control, and makes its settings and status available through AMX and Crestron media control protocols. Sennheiser's iOS apps offer the same settings on a mobile device.

Technical facts for planning

• Frequency range: 1880.000 - 1900.000 as listed for this model
• Latency: 19 ms
• Audio: 24 bit/48 kHz sampling, 20 Hz to 20,000 Hz response, dynamic range above 120 dB(A), signal-to-noise ratio above 90 dB(A), typical THD 0.1 %
• RF sensitivity: below -90 dBm
• Security: 256-bit AES encryption
• Power draw: 350 mA, with no battery included
• Dimensions and weight: 73 mm high, 405 mm long, 274 mm wide, 828 g

Outputs are one XLR 3M audio output, two RCA audio outputs and one RJ 45 network port. The box contains the receiver, one power supply and two antennas. The antennas can be mounted at the back or the front of the unit, and extension cables for wall mounting are available from the manufacturer. That helps when the rack sits far from the best reception point.

Where it fits in Qatar

A school hall in Al Rayyan preparing for assemblies, graduation ceremonies and parents' evenings is a typical fit. The receiver sits in the AV cabinet at the back of the hall and serves the wireless microphones used on stage. A ministry boardroom in Msheireb where meetings run in Arabic and English side by side benefits from clear speech and central control. A lecture theatre in Education City with several wireless microphones for lecturers and panellists can adjust transmitter settings from the rack, so staff do not need to walk to each microphone.

What to plan before ordering

Qatar summers push temperatures above 45 °C. The rated operating range is -10 °C to +55 °C with maximum 95 % relative humidity, so a rack in an air-conditioned room is well within range. A cabinet in an unventilated store or a room without cooling needs a thermal check first. Plan rack space for a half 19-inch unit, antenna positions, and cable runs for the XLR, RCA and RJ 45 connections. The manufacturer data does not state the power supply's input rating, so confirm it against Qatar's 240 V, 50 Hz mains with the SmartRooms Qatar team before ordering.

SmartRooms Qatar offers free site surveys, professional installation and delivery to all 8 municipalities of Qatar. Organisations buying through a purchase order or a government tender can submit an LPO with the quotation. Ready to specify the SL Rack Receiver DW-3-UK for your room? Request a quote from SmartRooms Qatar, and we usually respond within one working day.