The Sennheiser EW-D SK is a bodypack transmitter for the Evolution Wireless Digital (EW-D) platform, supplied in the Y1-3 band (1785-1800 MHz). Y1-3 is DECT-adjacent and is licence-exempt for wireless microphone use in the UK. The bodypack features a 3.5 mm locking mic/line input and is intended as a spare or add-on bodypack for EW-D systems.
Key Features
EW-D digital wireless bodypack transmitter
Y1-3 1785-1800 MHz operation
Licence-exempt in the UK
3.5 mm locking mic/line input
Mute switch plus LINK and DATA status LEDs
2 AA batteries or BA 70 rechargeable pack
Compatible with EW-D EM receivers
Transmitter only – no microphone supplied
LicensingThe Y1-3 variant operates in 1785-1800 MHz, a DECT-adjacent band; 1795-1800 MHz is licence-exempt in the UK while 1785-1795 MHz requires the Ofcom Shared PMSE licence.
Specifications
| Family | Evolution Wireless Digital (EW-D) |
| Model | EW-D SK |
| Sennheiser article | 508789 |
| Frequency band | Y1-3 (1785-1800 MHz) |
| Input | 3.5 mm locking mic/line |
| Power | 2 x AA or BA 70 |
| Operating time | Up to 12 hours (BA 70), up to 8 hours (AA) |
| Audio frequency response | 20 Hz – 20 kHz (-3 dB) |
| Dynamic range | 134 dB |
| System latency | 1.9 ms |
| Transmit power | 12 mW ERP (Y1-3) |
| Dimensions | 63 x 80 x 20 mm (without antenna) |
| Weight | Approx. 120 g (without batteries) |
| Operating temperature | -10 to +55 °C |
| In the box | EW-D SK bodypack transmitter, pouch, quick guide, safety guide, manufacturer declaration sheet |









