SL TS 153-S DW-4 B

What the SL TS 153-S DW-4 B is

This is a tablestand microphone from Sennheiser's SpeechLine Digital Wireless range, designed to pick up spoken voices on a table or lectern without cables running across the surface. The unit covered here is the DW-4 B variant, identified by article number 506628. The published specifications match the other variants in the 153 series, so the model code and article number are what you order by.

Charging, battery and run time

The microphone supports Qi wireless charging, so it can rest on a compatible pad, and it can also be charged through USB. Sennheiser sells a separate wireless charging base, the CHG 2W, for two mobile devices, but it is not included with this unit. Dedicated battery status LEDs show the charge level at a glance, so staff can check each unit before a session. The box includes a BA 40 rechargeable battery rated at 2.2 Ah and 3.6 V, with a typical operating time of 10 hours.

Audio performance and connections

The specification sheet lists an audio frequency response of 75 to 20,000 Hz, a signal-to-noise ratio above 90 dB(A) and a dynamic range above 120 dB(A), with 24-bit/48 kHz sampling. Latency is 19 ms and total harmonic distortion is typically 0.1 %. A dedicated XLR-5 socket accepts the MEG 14-40-L II B gooseneck microphone, which suits presenters who need a fixed close pickup alongside the main unit.

• Audio frequency response from 75 to 20,000 Hz
• Signal-to-noise ratio above 90 dB(A)
• Latency of 19 ms
• RF sensitivity below -90 dBm

Monitoring and control

The unit can be monitored and controlled through Sennheiser Control Cockpit, which lets an IT or AV team check status without visiting each table. The data does not describe the hardware or network requirements for that software, so confirm them with the SmartRooms Qatar team before designing the room network.

Where it fits in Qatar

In a government ministry or authority, the microphone suits press briefings and panel sessions in meeting rooms where a clean table matters. A university or training centre in Education City can place it on a lecturers' table and add a gooseneck for the main speaker. In hotel meeting rooms in West Bay, the unit moves easily between sessions because it needs no fixed cable run.

Summer outdoor events need extra care. The operating range is 10 to 45 °C with relative humidity up to 95 %, and summer afternoons in Qatar can exceed 45 °C. Keep the unit shaded and charge it indoors in an air-conditioned space, for example at a stadium forecourt event in Al Wakrah.

What to plan before you order

• Confirm the radio band: the data lists 1,880 to 1,900 MHz for the EU, so ask the team to confirm it suits your site.
• Decide how units will charge: USB, Qi pad, or a separate CHG 2W base.
• Plan around heat, since the operating range tops out at 45 °C.
• Add a gooseneck if the speaker needs one, as it is not listed in the box contents.

SmartRooms Qatar offers free site surveys, and quotations are usually issued within one working day. Ministries, schools and universities can order against a purchase order (LPO) or a government tender. To request a quote for the SL TS 153-S DW-4 B, send your room layout and the number of units you need.