The Sennheiser EW-D ASA is an active antenna splitter for Evolution Wireless Digital systems, distributing the signal from a single antenna pair to up to four EW-D EM or EW-DX EM 2 rack receivers. Configured as 2 x 1:4 (or 1 x 1:8 when two units are linked), it lets sound engineers and production companies run multi-channel wireless setups from one shared, remote-mountable antenna pair instead of cluttering the rack with individual aerials.
Compatibility
Designed for Evolution Wireless Digital systems — supports up to four EW-D EM or EW-DX EM 2 rack receivers per unit. This is the 470–694 MHz (Ch38) band variant, covering the UK UHF range used by EW-D and EW-DX. BNC antenna cables are supplied for connection to the receivers.
Features
✓Active 2 x 1:4 splitter (or 1 x 1:8 with two units linked)
✓Feeds up to four EW-D EM / EW-DX EM 2 receivers from one antenna pair
✓Unity gain of 0 ± 1 dB — no signal level penalty across the split
✓High linearity with IIP3 > 25 dBm for strong intermodulation performance
✓50 Ω impedance with BNC antenna connections
✓470–694 MHz band (Ch38) for UK UHF operation
✓Powered by the supplied NT 12-35 CS PSU (DC +12 V)
✓Rugged metal housing for fixed install and touring racks
Specifications
| Manufacturer | Sennheiser |
| Model | EW-D ASA (508879) |
| Type | Active antenna splitter, 2 x 1:4 or 1 x 1:8 |
| Frequency range | 470–694 MHz (Ch38) |
| Gain | 0 ± 1 dB |
| IIP3 | > 25 dBm |
| Impedance | 50 Ω |
| Reflection loss | 10 dB (all RF outputs) |
| Operating voltage | DC +12 V (NT 12-35 CS power supply unit) |
| Current consumption | 210 mA; max. 3 A total system |
| Operating temperature | -10 °C to +55 °C |
| Storage temperature | -20 °C to +70 °C |
| Relative humidity | 5–95% (non-condensing) |
| Dimensions | Approx. 212 x 168 x 43 mm |
| Weight | Approx. 1100 g |
