Description
The Shure PA821BX 8-Channel Antenna Combiner is a high-performance RF management solution designed to streamline multi-transmitter wireless monitoring systems. Built for professional AV, live sound, and broadcast environments, this unit efficiently combines up to eight PSM transmitters into a single antenna system, significantly reducing rack clutter while improving RF stability.
Operating within the 865–960 MHz frequency range, the PA821BX ensures clean signal distribution and minimizes intermodulation artifacts, delivering reliable and interference-free performance. Its active RF architecture maintains consistent signal levels, while LED indicators provide real-time monitoring of signal presence and overload conditions.
Engineered for scalability, the unit supports daisy-chaining via an expansion port, allowing system growth without compromising performance. With robust thermal efficiency, quiet operation, and seamless integration into rack-mounted setups, the PA821BX is an essential component for mission-critical wireless audio deployments.
| Specification | Details |
|---|---|
| Frequency Range | 865 to 960 MHz |
| Number of Channels | Supports up to 8 transmitters |
| RF Input Connectors | BNC |
| RF Input Configuration | Active |
| RF Input Impedance | 50 ohms |
| RF Gain | 0 dB (±2 dB) |
| Main Output Connector | BNC |
| Output Impedance | 50 ohms |
| Expansion Port | BNC, passive configuration |
| Expansion Port Impedance | 50 ohms |
| Expansion Port Insertion Loss | Less than 4 dB |
| RF Expansion Port Power Handling | Up to 33 dBm (2 W) |
| LED Indicators | Signal presence and overload monitoring |
| Detection Threshold | 2.5 dBm minimum |
| Overload Threshold | Greater than 24 dBm |
| Power Requirements | 100 to 240V AC, 50 to 60 Hz |
| Power Consumption | Up to 143 W |
| Current Draw | 1.59 A at 100V AC |
| Operating Temperature | -18°C to 63°C (0°F to 145°F) |
| System Integration | Designed for Shure PSM wireless systems |
| Scalability | Supports daisy-chaining of up to 2 units |
| Included Accessories | Power cord, DC output cables, BNC coaxial cables |
| Mounting | Rack-mountable form factor |
Payment & Security
Your payment information is processed securely, and we do not store credit card details or access your credit card information.
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.
From Scope to Sign-Off
A structured delivery process designed to reduce risk and keep projects moving.
Plan
Discovery, site review, requirements gathering, and project alignment. We define scope, constraints, and success criteria before any design work begins.
- Discovery calls & stakeholder interviews
- On-site survey & infrastructure review
- Requirements & use-case documentation
- Project scope, timeline & milestone alignment
Engineer
System design, schematics, signal flow, BOM development, and documentation. Every project leaves this phase with a complete engineering package.
- AV system design & signal flow diagrams
- Equipment selection & BOM development
- Rack layout & control system design
- As-built documentation package
Deploy
Procurement, logistics, installation, programming, commissioning, and training. We own the delivery from first shipment to final handoff.
- Authorized procurement & logistics coordination
- Physical installation & cable management
- Control system programming & configuration
- Commissioning, testing & end-user training
Support
Monitoring, maintenance, lifecycle planning, and long-term service agreements. We stay engaged long after project close.
- 24/7 remote system monitoring
- Preventive & reactive maintenance
- Technology lifecycle & refresh planning
- Long-term service level agreements
A decade of delivery — trusted by 275+ clients across industries
