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Shure A15HP High Pass Filter
- The A15HP helps to eliminate electrical and mechanical noise in an audio system
- The A15HP affects frequencies below 100 Hz.
- When connected to the microphone input on a typical mixer (800 ohms impedance or higher), the A15HP reduces low frequencies by 12dB per octave.
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The Shure A15HP in-line filter passes mid and high frequencies while reducing low frequencies. The A15HP helps to eliminate electrical and mechanical noise in an audio system such as 60Hz electrical hum from AC power lines, low-frequency rumble caused by wind noise or air conditioning system, and stage/floor noise transmitted to a microphone through the microphone stand. The A15HP affects frequencies below 100 Hz. When connected to the microphone input on a typical mixer (800 ohms impedance or higher), the A15HP reduces low frequencies by 12dB per octave. Female XLR to male XLR connector.
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For reference, the level into this Shure filter averaged around 1V RMS (way too high), but the load impedance was good - 50K (an FMR RNC1773 used to step on the camera feed.) This device performs beyond the call of duty when loaded very lightly, and that saved the situation. Would I normally recommend an A15HP for this application? Nope. Did it work amazingly well? Yup. Get one for your ENG / recording studio toolbox.