The Sennheiser EW-D ASA (Q-R-S) is a rugged, all-metal 4-way active antenna splitter designed for use with EW-D EM wireless receivers. Operating within the 470 to 694 MHz frequency range across Q, R, and S bands, it distributes diversity wireless signals from a single pair of antennas to up to four receivers, while also supplying DC power to each unit to reduce rack clutter and simplify installations. This makes it an efficient and scalable solution for professional wireless setups.

Built for reliable digital wireless performance, the EW-D ASA supports UHF transmission for enhanced range, stability, and scalability while eliminating noise, interference, and static bursts commonly associated with analog systems. It splits and amplifies incoming RF signals and routes them to connected receivers via included BNC cables. Users can operate the system with standard 1/4-wave antennas or upgrade to 1/2-wave dipole antennas for extended range. For even greater coverage and positioning flexibility, compatible ADP UHF passive directional antennas can be added. Setup and management are streamlined via the Smart Assist App, offering automated configuration, access to up to 2,240 selectable frequencies, and a 56 MHz bandwidth that supports up to 90 channels. The unit includes the NT 12-35 CS universal power supply with EU, UK, and US adapters for global compatibility.