Description
The Shure PA821B Eight-Port Antenna Combiner is a professional-grade RF management solution designed to streamline and optimize multi-channel in-ear monitoring systems. Built for use with Shure PSM personal monitor transmitters, this combiner allows up to eight transmitters to share a single antenna, significantly reducing rack clutter while improving RF performance.
Engineered for reliability in demanding live sound, broadcast, and touring environments, the PA821B enhances signal clarity by minimizing intermodulation artifacts and maintaining a clean RF spectrum. Its wideband frequency support ensures compatibility across a broad range of wireless setups, while the integrated LED indicators provide real-time monitoring of signal presence and overload conditions.
With expansion capabilities, improved thermal efficiency, and quiet operation, the PA821B is an essential component for centralized RF distribution in professional audio installations.
| Specification | Details |
|---|---|
| Frequency Range | 470–865 MHz |
| Supported Systems | Shure PSM Personal Monitor Systems |
| Number of Inputs | 8 RF inputs (BNC) |
| RF Input Configuration | Active |
| RF Input Impedance | 50 Ω |
| RF Gain | 0 dB (±2 dB) |
| Main Output Connector | BNC |
| Main Output Impedance | 50 Ω |
| Expansion Port | BNC (Passive) |
| Expansion Port Impedance | 50 Ω |
| Expansion Port Insertion Loss | < 4 dB |
| Expansion Port Max Operating Range | 33 dBm (2 W) |
| LED Indicators | Signal presence and overload detection |
| Minimum Detection Threshold | 2.5 dBm |
| Overload Threshold | Greater than 24 dBm |
| Power Requirements | 100–240 V AC, 50–60 Hz |
| Current Draw | 1.59 A at 100 V AC |
| Maximum Power Consumption | 143 W |
| Operating Temperature Range | -18°C to 63°C (0°F to 145°F) |
| Daisy-Chain Capability | Supports linking up to 2 combiners |
| Thermal Design | Enhanced cooling with low-noise fan |
| Included Accessories | IEC power cord, DC power cables, BNC coaxial cables |
| Optional Accessories | Directional/omnidirectional antennas, helical antennas, additional coaxial cables |
Payment & Security
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Return Policy (Short Summary)
We offer a 30-day return window for most unopened, factory-sealed items.
Returns must be authorized before shipping back and must include all original packaging and accessories. Opened or used items are not returnable unless defective.
Some products—such as custom orders, special-order items, audio gear, software, and LED video walls—are non-returnable. Non-defective returns may be subject to a 20–30% restocking fee, and customers are responsible for return shipping costs.
For damaged or incorrect items, please contact us immediately.
Building a Complete AV System?
This product is rarely deployed alone. It’s typically part of a fully integrated AV system. AVENDOR designs, integrates, and supports end-to-end environments—from single rooms to enterprise-wide deployments.
- System Design & Engineering
- Installation & Integration
- Programming & Ongoing Support
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