The Sennheiser EW-D ASA (Q-R-S) is a professional antenna splitter designed for Evolution Wireless Digital (EW-D) microphone systems. It enables multiple EW-D receivers to share the same pair of antennas, improving RF performance, simplifying rack setups, and reducing the need for multiple antenna pairs in multi-channel microphone installations.
This version operates across 470–694 MHz, covering the Q, R, and S EW-D frequency ranges.
Primary Application
Used for wireless microphone systems to ensure stable RF distribution when running several EW-D receivers in a rack or stage setup.
Key Features
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Wide frequency support: 470–694 MHz (Q-R-S bands)
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Distributes one antenna pair to multiple EW-D receivers
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Supports up to 4 receivers from a single unit
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Provides clean RF distribution with minimal signal loss
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Passive or active circuitry depending on configuration (EW-D ASA is typically active-ready through compatible boosters)
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Reduces antenna clutter and increases system reliability
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Ideal for large stages, churches, schools, theatres, and corporate AV racks
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Rackmount design for clean integration
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Works with Sennheiser omnidirectional or directional antennas
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Supports cascading for larger multi-channel systems
Technical Specifications
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Frequency range: 470–694 MHz
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RF inputs: 2 × antenna inputs (A/B)
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RF outputs: 4 × receiver outputs (A/B pairs)
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Impedance: 50 ohms
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Connector type: BNC
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Designed for EW-D handheld, bodypack, and lavalier microphone receivers
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Suitable for long cable runs when paired with antenna boosters
