Description
The Shure PA821BX Eight-Channel Antenna Combiner is designed to streamline RF management for professional in-ear monitoring systems operating in the 865–960 MHz frequency band. Built for demanding live sound, broadcast, and installed AV environments, this high-performance combiner consolidates up to eight wireless PSM transmitters into a single antenna system, reducing rack clutter while improving overall RF efficiency.
With wideband operation, low insertion loss, and optimized intermodulation performance, the PA821BX ensures a cleaner RF environment and more reliable wireless performance. Its intelligent design includes LED indicators for signal presence and overload monitoring, along with an improved thermal system for quieter operation and enhanced reliability. The expansion port enables daisy-chaining of additional combiners, making it ideal for scalable deployments.
Engineered for professional workflows, the PA821BX delivers consistent signal distribution, simplified setup, and dependable performance in complex wireless environments.
| Specification | Details |
|---|---|
| Brand | Shure |
| Product Type | Eight-Channel Antenna Combiner |
| Frequency Range | 865–960 MHz |
| Number of Channels | Supports up to 8 transmitters |
| RF Input Connectors | BNC |
| RF Output Connector | BNC |
| Expansion Port | BNC, passive configuration |
| RF Gain | 0 dB (±2 dB) |
| Input Impedance | 50 ohms |
| Output Impedance | 50 ohms |
| Expansion Port Impedance | 50 ohms |
| Insertion Loss (Expansion Port) | Less than 4 dB |
| RF Expansion Port Operating Range | Up to 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 to 240 V AC, 50–60 Hz |
| Power Consumption | 143 W maximum |
| Current Draw | 1.59 A at 100 V AC |
| Operating Temperature Range | -18°C to 63°C (0°F to 145°F) |
| System Compatibility | Shure PSM Personal Monitor Systems |
| Daisy Chain Capability | Supports up to 2 combiners via expansion port |
| Cooling System | Enhanced low-noise fan design |
| Included Accessories | IEC power cord, DC power cables, BNC coaxial cables |
| Application | Live sound, broadcast, touring, installed AV systems |
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
