The Sennheiser AB 4-BW is an inline UHF antenna booster designed to compensate for signal loss in long antenna cable runs. It is used in professional wireless microphone systems where distance, cabling, or RF congestion reduces signal strength. The booster provides band-filtered gain in the 626–698 MHz range and integrates directly via BNC connectors. It is commonly used with Sennheiser Evolution Wireless, 2000 series, and distributed antenna systems.
Key Features
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Boosts antenna signal by approximately +10 dB to +12 dB
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Frequency range: 626–698 MHz (BW band)
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Helps overcome coaxial cable losses in long runs
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Band-filtered to improve signal-to-noise performance
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Standard BNC male-to-female inline design
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Powered remotely through compatible receivers or antenna splitters
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Rugged metal housing for professional use
Technical Specifications
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Frequency Range: 626–698 MHz
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Gain: Approximately +10 dB (varies by source, some state +12 dB)
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Connector Type: BNC male to BNC female
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Impedance: 50 ohms
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Powering: Via antenna cable from compatible devices (no external PSU required in most systems)
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Ideal Use: Long antenna cable installations, distributed RF systems, multi-receiver racks
