Shure A15HP In-Line High-Pass Filter – 100 Hz Balanced XLR

The Shure A15HP In-Line High-Pass Filter is a professional audio accessory designed to reduce unwanted low-frequency noise in balanced microphone signal paths. Featuring a 100 Hz high-pass filter, the A15HP helps minimize electrical hum, wind noise, air-conditioning rumble, and vibrations transmitted through microphone stands or floors.

Designed for professional recording, live sound, broadcast, and installed audio applications, the Shure A15HP XLR high-pass filter provides a convenient way to reduce low-frequency interference without requiring a separate external processor.

When connected to a microphone input with an impedance of 800 ohms or greater, the A15HP provides a 12 dB-per-octave rolloff below 100 Hz, helping reduce unwanted bass frequencies while maintaining a relatively flat response above the rolloff point.

Reduce Low-Frequency Noise and Rumble

The Shure A15HP is designed to reduce common sources of unwanted low-frequency sound that can affect microphone recordings and live audio.

Typical noise sources include:

• 60 Hz electrical hum that can interfere with audio signals
• Wind noise that produces unwanted low-frequency rumble
• Air-conditioning and HVAC noise in conference rooms and recording spaces
• Microphone stand vibrations transmitted through mounting hardware
• Floor-transmitted vibrations that can affect microphone clarity

By reducing these low-frequency components, the A15HP can help improve the clarity of speech and other microphone signals.

100 Hz High-Pass Filtering

The A15HP attenuates frequencies below its nominal 100 Hz rolloff point. Its performance depends on the impedance of the connected microphone input.

• 800-ohm or higher input impedance: Provides a 12 dB-per-octave rolloff below 100 Hz.
• 150-ohm input impedance: Provides 3 dB of attenuation at 100 Hz.
• Above the rolloff region: Maintains a relatively flat response, with a maximum insertion loss of 0.5 dB at 1 kHz.

These characteristics make the A15HP useful for applications where unwanted low-frequency noise must be reduced while preserving higher-frequency audio content.

Balanced XLR In-Line Design

The Shure A15HP is designed for balanced XLR audio connections, allowing it to be incorporated into compatible microphone signal paths.

Its in-line configuration provides a straightforward filtering solution for professional audio installations and recording setups.

Shure A15HP Key Features

• 100 Hz high-pass filter for balanced microphone signals
• Helps reduce 60 Hz hum, wind noise, HVAC rumble, and mechanical vibrations
• 12 dB/octave rolloff below 100 Hz with input impedances of 800 ohms or greater
• 3 dB attenuation at 100 Hz with a 150-ohm input load
• Relatively flat frequency response above the rolloff region
• Maximum insertion loss of 0.5 dB at 1 kHz
• Balanced XLR in-line configuration
• Suitable for recording, live sound, and installed microphone systems
• Convenient alternative when a separate high-pass filter processor is not needed

Shure A15HP Technical Specifications

Common Applications

The Shure A15HP High-Pass Filter is suitable for:

• Speech and vocal microphone systems
• Conference rooms and meeting facilities
• Live sound reinforcement
• Recording and broadcast applications
• Microphones affected by stand or floor vibrations
• Installations with HVAC rumble or low-frequency background noise

Why Buy the Shure A15HP from Audio Supply?

Audio Supply offers professional Shure microphone accessories, audio signal management equipment, and installation products for commercial sound, recording, and live audio applications.

The Shure A15HP In-Line High-Pass Filter is a practical solution for reducing unwanted low-frequency noise in compatible balanced microphone systems.