Sennheiser ADP UHF Passive Directional Antenna for EW-D Wireless Systems (470 to 1075 MHz)

The Sennheiser 508863 is a directional antenna with a passive design that gives any EW-D wireless microphone setup a stronger, cleaner RF signal. By focusing reception within a 100-degree pickup arc, it helps you pull in the transmitters you want while pushing away unwanted interference, so performers and presenters can move freely without unexpected dropouts.

Covering the entire 470 to 1075 MHz range, the antenna supports every EW-D transmitter option, from bodypacks on musicians to handheld mics in conference rooms. Live sound engineers can aim it toward the stage to secure stable links for vocalists and instruments, while installers in houses of worship, schools, and corporate venues can discreetly position it for reliable coverage across large seating areas. Outdoor festival crews will appreciate that it keeps working from chilly mornings at 14 °F to hot afternoons at 131 °F.

With typical 5 dBi forward gain and a front-to-back ratio greater than 14 dB, the antenna adds headroom that receivers can use to fight through congested airwaves. Because the design is passive, there is no need for external power or inline amplifiers—just connect the built-in BNC female jack to any compatible EW-D receiver or splitter and you are ready to go.

Mounting takes only seconds. The integrated bracket accepts both 3/8-16 and 5/8-27 threads, so it fits standard mic stands, lighting poles, and many wall mounts straight out of the case. Its footprint measures 12.5 by 12.2 inches and the weight is only 11.2 ounces, making transport simple and rigging stress-free.

Whether you manage a touring rig, oversee an installed AV system, or need a dependable backup antenna in your rental inventory, the ADP UHF delivers the consistency that keeps wireless audio sounding effortless.

Highlights:

• Works across the full 470 to 1075 MHz UHF spectrum
• Typical 5 dBi forward gain for stronger reception
• 100-degree pickup angle with better than 14 dB front-to-back isolation
• BNC female connector for quick attachment to EW-D receivers and splitters
• Fits standard mic stands via 3/8-16 or 5/8-27 threads
• Operates from 14 to 131 °F, suitable for indoor and outdoor use
• 12.5 × 12.2 inches, weight 11.2 ounces for easy transport