The Shure A15AS Switchable In-Line Attenuator is a professional audio accessory designed to reduce the level of balanced microphone or line-level signals by 15, 20, or 25 dB. Featuring selectable attenuation settings, standard 3-pin XLR connections, and phantom power pass-through, the A15AS provides a convenient solution for preventing signal overload in recording, live sound, and professional audio applications.
Ideal for use with high-output microphones, mixers, and recording equipment, the Shure A15AS microphone attenuator helps reduce excessive signal levels before they reach sensitive audio inputs. Its compact in-line design makes it easy to integrate into existing balanced audio signal paths without requiring additional external equipment.
Selectable 15, 20, or 25 dB Attenuation
The Shure A15AS features a three-position slide switch that allows users to select the appropriate amount of signal attenuation.
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15 dB: Provides moderate signal reduction for high-output microphone or line-level sources.
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20 dB: Offers additional attenuation when greater signal reduction is required.
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25 dB: Delivers the highest attenuation setting for particularly strong input signals.
These selectable settings make the A15AS a flexible solution for matching signal levels between professional audio components.
Prevent Microphone and Mixer Input Overload
High-output microphones can produce excessive signal levels when used near loud instruments, amplifiers, or other high sound pressure level sources.
The Shure A15AS XLR attenuator reduces the microphone signal before it reaches the mixer or recorder, helping prevent input overload and unwanted distortion.
It can also reduce the output level of a mixer when connecting to a recorder's auxiliary-level input, provided the equipment uses a compatible balanced audio connection.
Phantom Power Pass-Through for Condenser Microphones
Unlike some signal attenuation accessories, the Shure A15AS allows phantom power to pass through from the mixer or audio interface to the connected microphone.
This makes it suitable for compatible condenser microphones that require phantom power while still providing selectable signal attenuation.
Standard 3-Pin XLR Connections
The Shure A15AS features professional XLR connectors for straightforward integration into balanced audio systems.
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Input: Female 3-pin XLR connector
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Output: Male 3-pin XLR connector
The in-line configuration allows the attenuator to be placed between a microphone and mixer, or between other compatible balanced audio components.
Shure A15AS Key Features
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Three selectable attenuation levels: 15 dB, 20 dB, or 25 dB
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Reduces balanced microphone-level and line-level signals
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Helps prevent mixer and recorder input overload
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Three-position slide switch for convenient attenuation selection
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Female 3-pin XLR input and male 3-pin XLR output
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Phantom power pass-through for compatible condenser microphones
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Suitable for high sound pressure level recording applications
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Compact in-line design for professional audio signal chains
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Useful for microphone signal control and audio level matching
Shure A15AS Technical Specifications
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Specification
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Details
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Manufacturer
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Shure
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Model
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A15AS
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Product Type
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Switchable In-Line Attenuator
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Attenuation Settings
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15 dB / 20 dB / 25 dB
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Signal Compatibility
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Balanced Microphone or Line Level
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Attenuation Control
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Three-Position Slide Switch
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Input Connector
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3-Pin Female XLR
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Output Connector
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3-Pin Male XLR
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Phantom Power
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Pass-Through Supported
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Configuration
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In-Line
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Common Applications
The Shure A15AS Switchable Attenuator is suitable for a variety of professional audio applications, including:
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Recording high-output microphones in loud environments
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Reducing microphone signal levels before a mixing console
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Preventing recorder microphone input overload
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Attenuating balanced mixer outputs for compatible recorder inputs
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Live sound reinforcement and recording setups
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Condenser microphone applications requiring phantom power pass-through
Why Buy the Shure A15AS from Audio Supply?
Audio Supply offers Shure microphone accessories, professional audio signal management products, and recording equipment for commercial sound, live performance, and installed audio applications.
The Shure A15AS Switchable In-Line Attenuator is a practical choice for audio professionals who need reliable, selectable signal reduction without changing microphones or adding complex equipment.
