Evolution Wireless Digital EW-DX is Sennheiser’s professional digital UHF platform, offering AES 256 encryption, up to 88 MHz switching bandwidth, equidistant frequency grid and automatic frequency setup via the Smart Assist app or Wireless Systems Manager. Band variant: S1-10, 606 – 694 MHz (UK CH38 and above). Operation within UK CH38 is covered by an Ofcom shared PMSE licence; frequencies above 614 MHz require a coordinated licence.
Key Features
Professional digital UHF platform with AES 256 audio encryption
Up to 88 MHz switching bandwidth with equidistant frequency grid
134 dB transmitter input dynamic range, no audio gain staging required
Automatic setup via Smart Assist app or Wireless Systems Manager over network
Persistent e-ink display remains readable when the transmitter is powered down
Compatible with Sennheiser BA 70 Li-ion pack and CHG 70N networked charger
UK band S1-10: 606 – 694 MHz (UK CH38 and above)
RF output: BLE: max. 10 mW EIRP
Occupied bandwidth: 200 kHz
Audio frequency response: 20 Hz – 20 kHz (-3 dB)
Specifications
| System | Audio link frequency ranges |
| System: R1-9 | 520 – 607.8 MHz |
| System: S1-10 | 606.2 – 693.8 MHz |
| System: S2-10 | 614.2 – 693.8 MHz |
| System: S4-10 | 630 – 693.8 MHz |
| System | 1785.2 – 1799.8 MHz |
| System: V3-4 | 925.2 – 937.3 MHz |
| System: V5-7 | 941.7 – 951.8 MHz & 953.05 – 956.05 MHz & 956.65 – 959.65 MHz |
| System: X1-6 | 1350.2 – 1398.8 MHz |
| System: X9-18 | 1435.2 – 1524.8 MHz |
| System: Y1-3 | 1785.2 – 1799.8 MHz |
| System: Bluetooth Low Energy (BLE) frequency range | 2402 – 2480 MHz |
| System: Audio frequency response | 20 Hz – 20 kHz (-3 dB) |
| System: Dynamic range | 134 dB |
| System: System latency | 1.9 ms |
| System: Operating temperature | -10 °C – +55 °C (14 °F – 131 °F) |
| System: Relative humidity | 5 – 95 % (non-condensing) |
| EW-DX EM 2 (Rack Receiver): Input voltage | 11 – 13 V DC or PoE IEEE 802.3af Class 0 (CAT5e or higher) |
| EW-DX EM 2 (Rack Receiver): Input current | <= 1 A |
| EW-DX EM 2 (Rack Receiver): Transmit power (radiated) | BLE: max. 10 mW EIRP |
| EW-DX EM 2 (Rack Receiver): Audio output power | 18 dBu max. |
| EW-DX EM 2 (Rack Receiver): Headphone output | 2x 70 mW @ 32 Ω |
| EW-DX EM 2 (Rack Receiver) | Ethernet |
| EW-DX EM 2 (Rack Receiver): Dimensions | 212 x 44 x 189 mm (8.35″ x 1.73″ x 7.44″) |
| EW-DX EM 2 (Rack Receiver): Weight | approx. 1000 g (2.2 lbs) (without antennas and power supply) |
| EW-DX SKM-S (Handheld Transmitter): Input voltage | 2.0 – 4.35 V |
| EW-DX SKM-S (Handheld Transmitter): Input current | < 300 mA |
| EW-DX SKM-S (Handheld Transmitter): Power supply | 2 AA batteries 1.5 V (alkali manganese) or BA 70 rechargeable battery pack |
| Sennheiser part number | 509464 |
| UK band | S1-10 (606 – 694 MHz (UK CH38 and above)) |





