The Shure A120S In-Line On/Off Switch is a versatile microphone control accessory designed to add Push-to-Talk, Push-to-Mute, or latching On/Off functionality to compatible microphone systems. Featuring configurable switching options, a comfortable handheld design, and a rotating belt clip, the A120S provides convenient microphone control for professional audio applications.
Designed for use with balanced mono audio signals or unbalanced stereo signals, the Shure A120S supports normally-open and normally-closed wiring configurations. Its combination pushbutton and rotary knob allows the switch to operate in either momentary (spring-return) or locking mode, making it adaptable to different microphone control requirements.
The A120S is supplied unterminated and requires installer wiring and soldering to configure the desired function.
Configurable Microphone Switching
The Shure A120S can be wired for several operating modes:
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Push-to-Talk: Activates the microphone while the button is pressed.
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Push-to-Mute: Temporarily mutes the microphone, useful as a cough button.
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Latching On/Off: Maintains the selected switching state without continuously holding the button.
The switch supports normally-open (NO) and normally-closed (NC) configurations, allowing installers to select the appropriate wiring arrangement for their application.
Comfortable Design and Flexible Mounting
The A120S features a contoured housing designed for comfortable handheld operation. Its attached belt clip rotates into four positions, providing convenient placement for different users and installations.
The switch also includes a crimp-on strain relief for ¼-inch (6.4 mm) diameter cable and a flexible strain relief that accommodates different cable sizes.
Shure A120S Key Features
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In-line microphone On/Off control switch
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Configurable Push-to-Talk, Push-to-Mute, or latching On/Off operation
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Momentary or locking pushbutton action
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Normally-open or normally-closed wiring options
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Supports balanced mono and unbalanced stereo audio signals
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Contoured housing for comfortable operation
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Four-position rotating belt clip
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Crimp-on and flexible cable strain relief accessories
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Supplied unterminated for custom installation wiring
Shure A120S 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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A120S
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Product Type
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In-Line Microphone On/Off Switch
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Switch Operation
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Momentary or Latching
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Switch Functions
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Push-to-Talk, Push-to-Mute, On/Off
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Wiring Configurations
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Normally Open / Normally Closed
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Signal Compatibility
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Balanced Mono / Unbalanced Stereo
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Control Mechanism
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Pushbutton with Rotary Selector
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Belt Clip
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Rotating, Four Positions
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Cable Strain Relief
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Crimp-On for 6.4 mm (¼") Cable
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Additional Strain Relief
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Flexible Relief for Large or Small Cables
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Termination
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Unterminated; Soldering Required
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Ideal Applications
The Shure A120S is suitable for installed microphone systems, paging applications, public address systems, and professional audio setups requiring convenient microphone muting or activation.
Its configurable operation makes it particularly useful when a microphone needs a dedicated Push-to-Talk button or temporary mute control.
Why Buy the Shure A120S from Audio Supply?
Audio Supply offers Shure microphone accessories and professional audio installation equipment for commercial sound systems, conferencing, and paging applications.
The Shure A120S In-Line Switch provides a flexible solution for adding customized microphone control to compatible audio systems.
