Sennheiser ACA 3 Antenna Combiner

The ACA 3 combines eight receiver antenna inputs down to two shared antenna runs at unity gain, so a rack of stationary wireless receivers can share one distributed antenna system instead of running a separate antenna pair to every unit. It works across analog and digital Sennheiser stationary receivers alike, spanning the 470-798 MHz range.

Each antenna input switches DC power independently for a head amp or active antenna, and unused inputs can be isolated at the front panel. Status LEDs report input state, RF presence, DC power, and current overload at a glance, which matters when a combiner is buried mid-rack during a show.