Evolution Wireless Digital (EW-D) is Sennheiser’s entry digital UHF platform, using a 56 MHz tuning range, equidistant frequency grid and 134 dB transmitter dynamic range for gain-structure-free operation. The Smart Assist app handles setup over Bluetooth Low Energy. Band variant: S1-7, 606.2 – 662 MHz (UK CH38). Requires an Ofcom shared PMSE licence in the UK.
Key Features
✓Digital UHF transmission with equidistant frequency grid for dense multi-channel use
✓56 MHz switching bandwidth, up to 90 channels per environment
✓134 dB transmitter input dynamic range removes the need for gain-structure matching
✓Smart Assist mobile app handles scan, sync and parameter setup over Bluetooth Low Energy
✓Half-rack metal receiver with detachable BNC antennas and balanced XLR plus 6.3 mm jack outputs
✓Runs on two AA cells or the optional BA 70 Li-ion pack
✓UK band S1-7: 606.2 – 662 MHz (UK CH38)
✓MMD 835 capsule: cardioid dynamic capsule tuned for vocals with controlled presence lift
✓RF output: Audio link: 10 mW ERP (Range Y1-3: 12 mW ERP); BLE: max. 10 mW EIRP
✓Switching bandwidth: 200 kHz
Specifications
| System | Audio link frequency ranges |
| System: U1/5 | 823.2 – 831.8 MHz & 863.2 – 864.8 MHz |
| System: Bluetooth Low Energy (BLE) frequency range | 2402 – 2480 MHz |
| System: Audio frequency response | 20 Hz – 20 kHz (-3 dB) @ 3 dBfs |
| System: Audio THD | <= -60 dB for 1 kHz @ -3 dBfs input level |
| System: Operating temperature | -10 °C – +55 °C (14 °F – 131 °F) |
| System: Relative humidity | 5 – 95 % (non-condensing) |
| EW-D EM (Rack Receiver): Input voltage | 11 – 13 V DC |
| EW-D EM (Rack Receiver): Input current | <= 300 mA |
| EW-D EM (Rack Receiver): Transmit power (radiated) | BLE: max. 10 mW EIRP |
| EW-D EM (Rack Receiver): Audio output power | 18 dBu max. |
| EW-D EM (Rack Receiver): Dimensions | 212 x 44 x 189 mm |
| EW-D EM (Rack Receiver): Weight approx. | 1000 g (without antennas and power supply) |
| EW-D SKM-S (Handheld Transmitter): Input voltage | 2.0 – 4.35 V |
| EW-D SKM-S (Handheld Transmitter): Input current | < 300 mA |
| EW-D SKM-S (Handheld Transmitter): Power supply | 2 AA batteries 1.5 V (alkali manganese) or BA 70 rechargeable battery pack |
| EW-D SKM-S (Handheld Transmitter): Occupied bandwidth | 200 kHz |
| EW-D SKM-S (Handheld Transmitter): Transmit power (radiated) | Audio link: 10 mW ERP (Range Y1-3: 12 mW ERP); BLE: max. 10 mW EIRP |
| EW-D SKM-S (Handheld Transmitter) | Dimensions (Ø x l) |
| MMD 835 (Microphone Module): Transducer principle | dynamic |
| MMD 835 (Microphone Module): Sensitivity | 2.1 mV/Pa |
| MMD 835 (Microphone Module): Sound pressure level | 154 dB SPL |
| MMD 835 (Microphone Module): Pick-up pattern | cardioid |
| EW-D SK (Bodypack Transmitter): Input voltage | 2.0 – 4.35 V |
| EW-D SK (Bodypack Transmitter): Input current | < 300 mA |
| EW-D SK (Bodypack Transmitter): Power supply | 2 AA batteries 1.5 V (alkali manganese) or BA 70 rechargeable battery pack |
| EW-D SK (Bodypack Transmitter): Occupied bandwidth | 200 kHz |
| EW-D SK (Bodypack Transmitter) | Transmit power (radiated) |
| Sennheiser part number | 508773 |
| UK band | S1-7 (606.2 – 662 MHz (UK CH38)) |
