The Shure A15RF reduces interference from AM radio stations that may bleed into microphone lines when using long cables in microphone installations such as suspending choir microphones. The A15RF passes phantom power, and can be used with condenser microphones.For best results, the A15RF should be installed at the end of the cable nearest to the microphone. In situations where this is not practical, the A15RF can also be installed at the mixer input, although RF attenuation may be somewhat reduced.
In cases of extreme RF interference, two or more A15RF's can be placed in series in the same microphone line, preferably with one at each end of the microphone cable. In cases where interference is present but not audible, the A15RF can improve perceived sound quality by removing low-level interference components from the audio signal path.
Radio interference on a microphone cable.
Troubleshooting and fixing RFI is a trial and error process. First, you can try to rule ...
A15 Problem Solvers - Functions of Each
All Shure A15 devices have XLR connectors. A15AS - Attenuator Switchable. The A15AS ...
Shure VP88 RFI ( radio station interference)
The AM RF signal is probably being picked up by the mic cable, carried into the mic on the cab...
RFI when using a Shure mic and a Korg recorder
The sources and causes of RFI are numerous, enough so that there are entire books written on t...
Mic Level and Line Level -- What do they mean?
Some mixers have switches on the rear panel for setting each input jack or output jack for mic...
Difference between a dynamic and condenser microphone
Dynamic and condenser describe the operating principal used in a microphone. Operating pr...
Get Live Support
Instructional articles, guides, demos and more! Our experts offer industry-proven tips and tricks to help you get the most from your gear.
Service & Repair
Detailed policy information regarding customer service numbers, service modifications, and replacement parts.