Sennheiser ACA 3 active antenna combiner

The Sennheiser Active Zone Antenna Combiner 2×4:1 (1U, 19”) is a professional active RF distribution unit designed for complex wireless microphone systems. It allows independent control of multiple antenna zones, ensuring flexible, reliable signal coverage across large venues such as broadcast productions, sports events, and multi-room installations.

The Sennheiser Active Zone Antenna Combiner 2×4:1 (ACA 3) is a high-performance active antenna combiner designed for advanced wireless microphone infrastructure. It enables the combination and management of up to four antenna zones per system, providing flexible RF distribution for large-scale and complex environments.

This system is ideal for professional broadcast productions, live sports coverage, television outside broadcasts, and multi-room event venues where antennas must be distributed across different physical areas. Each antenna input can be individually activated or deactivated, and its integrated power switching allows control over antenna amplifiers for optimized signal management.

Operating across a wide 470–798 MHz frequency range, the ACA 3 supports both analog and digital Sennheiser wireless microphone systems. Its active design ensures stable RF performance and consistent signal distribution even in demanding setups.

The unit features front-panel status indicators for active inputs and power monitoring, allowing quick system overview and diagnostics during operation. Housed in a standard 19” rack-mount 1U chassis, it integrates easily into professional audio racks and broadcast systems.

Key Features:

• Active 2×4:1 antenna zone combiner system
• Independent switching for each antenna zone
• Switchable power supply for antenna amplifiers
• Broadband RF input for flexible system design
• Front-panel active input and power indicators
• Supports analog and digital Sennheiser wireless systems
• Designed for large-scale RF distribution setups
• 19” rack-mount (1U) professional chassis
• Ideal for broadcast, sports, and multi-zone installations