Sennheiser EW-D ASA 4-Way Active Antenna Splitter with DC Distribution for EW-D Wireless Systems

Product Overview

The Sennheiser EW-D ASA is a 4-way active antenna splitter designed specifically for the EW-D digital wireless ecosystem, enabling one pair of diversity antennas to serve up to four EW-D receivers simultaneously. By centralizing antenna placement and distributing the RF signal through active circuitry, the EW-D ASA dramatically simplifies multi-channel wireless installations while maintaining the signal integrity that professional productions demand. DC power distribution via the antenna cables eliminates the need for separate power supplies at each antenna, reducing cable clutter and installation complexity. Whether deployed in conference rooms, theaters, or houses of worship, the EW-D ASA is the definitive infrastructure component for scalable EW-D wireless systems.

Product Description

Running multiple wireless channels in a single venue presents a persistent challenge: where to place antennas for optimal coverage without compromising any individual receiver. The Sennheiser EW-D ASA solves this problem elegantly by acting as the central hub of a distributed antenna system. A single pair of high-quality antennas — positioned in the ideal location for RF coverage — feeds the EW-D ASA, which then actively amplifies and distributes the signal to up to four connected EW-D receivers without degradation.

Active distribution means the EW-D ASA compensates for cable losses inherent in longer antenna runs, so you are no longer forced to compromise on receiver rack placement versus antenna positioning. Integrated DC power distribution sends phantom power through the antenna cables to the remote antennas, eliminating the need for separate power injectors or local power supplies at the antenna location. The result is a cleaner installation with fewer cables and failure points.

The EW-D ASA is built to match the EW-D receiver's half-rack 1U form factor, allowing it to sit neatly alongside receivers in a standard equipment rack. Its compatibility is purpose-built for the EW-D platform, ensuring the active gain stages are precisely matched to the signal levels produced by EW-D antennas and expected by EW-D receivers. For installations with more than four receivers, multiple EW-D ASA units can be deployed to extend coverage across an entire system.

Key Features

• 4-Way Active RF Distribution — Distributes one pair of diversity antennas to up to 4 EW-D receivers with active gain compensation to offset cable losses.
• DC Power Distribution via Antenna Cables — Powers remote active antennas through the coaxial antenna cables, eliminating separate power injectors and reducing cabling complexity.
• Purpose-Built for the EW-D Ecosystem — Gain stages are precisely matched to EW-D signal levels for transparent, low-noise signal distribution throughout the chain.
• Centralized Antenna Placement — Place a single set of antennas in the optimal RF location and serve all four receivers from one vantage point, maximizing coverage uniformity.
• Reduces Infrastructure Costs — One antenna pair handles up to four receivers instead of four separate antenna pairs, cutting hardware and installation costs significantly.
• Clean Rack Integration — Matches the half-rack 1U footprint of EW-D receivers, maintaining a tidy and professional equipment rack layout.
• Scalable to Larger Systems — Use multiple EW-D ASA units in parallel installations requiring more than four receivers without additional antenna infrastructure.
• Simplified Cable Management — Fewer antenna runs from rack to antenna positions reduce installation time, cable tray usage, and long-term maintenance overhead.
• Professional Build Quality — Sennheiser-grade construction ensures reliable performance in demanding live event, installed AV, and broadcast environments.

Typical Applications

• Multi-channel wireless microphone installations in houses of worship
• Theatrical productions with 2–4 simultaneous wireless channels
• Corporate conference rooms and boardrooms with multiple wireless mics
• University lecture theaters with presenter and audience wireless systems
• Broadcast studios requiring distributed antenna coverage
• Hotel ballrooms and event spaces with fixed wireless infrastructure
• Live concert and festival stages with central rack systems

Technical Specifications

Frequently Asked Questions

Q: Is the EW-D ASA compatible with older EW (G3/G4) receivers?

No. The EW-D ASA is purpose-engineered for the EW-D digital wireless platform. It is not compatible with the analog EW 100, EW 300, or EW 500 G4 series receivers, which use different signal levels and antenna configurations.

Q: How many EW-D ASA units can I use together in a large installation?

You can use multiple EW-D ASA units simultaneously. Each unit serves up to 4 receivers, so two units would cover 8 receivers, three units 12 receivers, and so on. This is the recommended expansion path for larger EW-D systems.

Q: Do I need active antennas to use the EW-D ASA?

The EW-D ASA distributes DC power through the antenna cables to support active remote antennas. Sennheiser recommends using compatible active antennas (such as the A 5000-CP or AD 3700) for optimal performance when running long antenna cable runs.

Q: Can the EW-D ASA improve range compared to running antennas directly into receivers?

Yes, indirectly. By allowing you to optimally position a single set of antennas in the best RF location for the entire system, the EW-D ASA enables better overall coverage than compromised individual antenna placements driven by rack location constraints.

Q: What cable type connects the EW-D ASA to receivers?

The EW-D ASA uses standard BNC coaxial antenna connectors, consistent with the EW-D receiver's antenna ports. Standard 50-ohm coaxial antenna cable (RG8, RG213, or Sennheiser-specified cable) is used for both antenna and receiver connections.

Q: Does the EW-D ASA require its own power supply?

Yes. The EW-D ASA requires an external DC power supply to operate its active gain stages and to provide DC power distribution through the antenna cables. A compatible power adapter is included or specified in the product documentation.

Q: What variants of the EW-D ASA are available?

The EW-D ASA is available in standard Q-R-S band variants (SKU 508879) and a CN/ANZ regional variant (SKU 508998) for Australia, New Zealand, and China markets. Both operate within the EW-D compatible frequency range.