Shure A15HP High Pass XLR Microphone Filter

The Shure A15HP is an inline high pass filter built into a compact XLR barrel connector. It attenuates frequencies below 100 Hz at a rate of 12 dB per octave, making it an efficient tool for removing low-frequency noise from microphone signals before they reach your mixer or preamp. Common uses include eliminating stage rumble from floor-mounted microphones, reducing HVAC hum in installed sound systems, and cutting wind noise in outdoor broadcast setups. Because it sits inline between a mic cable and an input, it can be deployed in seconds without altering your existing signal chain or requiring any configuration.

As a fully passive device, the A15HP draws no power and transparently passes phantom power to condenser microphones. Its female-to-male XLR design ensures universal compatibility with standard microphone cables and inputs. The fixed 100 Hz cutoff keeps things simple — there are no switches or adjustments to accidentally bump during a show. For engineers who need a reliable, set-and-forget solution to low-frequency noise on specific channels, the A15HP is a proven and widely trusted option from Shure's line of inline audio adapters.