Shure A15RF — In-Line RF Interference Attenuator
A15RF Overview
The Shure A15RF is a passive in-line accessory engineered to address a common problem in professional audio installations: AM radio frequency interference bleeding into microphone lines over extended cable runs. Long cable lengths act as antennas, making them susceptible to RF pickup that can degrade signal integrity and introduce unwanted noise into a mix. The A15RF inserts directly into the signal path to attenuate that interference before it reaches the console or preamp. It is a practical solution for installed sound engineers, system integrators, and touring professionals working in RF-dense environments.
Its in-line form factor requires no external power and adds no complexity to the signal chain, making it a straightforward diagnostic and corrective tool for troubleshooting RF-related noise issues on the fly or as part of a permanent installation.
Key Features
- AM RF Interference Reduction — Attenuates AM radio station bleed that couples into microphone lines, particularly on long cable runs
- In-Line Design — Inserts directly into the microphone signal path with no external power required
- Long Cable Run Solution — Specifically addresses the antenna effect of extended microphone cables in RF-dense environments
- Passive Operation — No batteries or phantom power dependency, ensuring reliable performance in any signal chain
- Compact Form Factor — Minimal footprint for use in tight stage boxes, rack installations, or live performance setups
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