Shure A400MB Microflex Mute Button & Adapter

The Shure A400MB is a surface-mount mute button and adapter designed for Microflex MX395-LED boundary microphones as well as MX405, MX410, and MX415 gooseneck models. Installed between the microphone and the table, it introduces a touch-sensitive control that lets each presenter silence or activate a mic without reaching for a mixer or relying on a technician.

Inside the compact washer-style housing is a switch that you can set for latched or momentary operation. Use latched mode when you want a press to mute and another press to unmute, or choose momentary mode when you want the mic to stay muted only while the button is held. Logic connections make it easy to hand local control to the person at the table or tie the mute function into a remote or third-party system for centralized management.

Installation is straightforward. A 5-pin mini XLR on one side and a block connector on the other eliminate soldering, and the unit seats cleanly in table surfaces from 0.59 to 1.18 inches thick. Adjustable touch sensitivity helps it respond reliably in different room conditions, while included color rings let you match the finish of the surrounding hardware.

Boardrooms, council chambers, classrooms, and video-conference spaces all benefit from the added layer of control the A400MB provides. It helps keep background noise out of the mix, gives each participant confidence that they can step in and out of the conversation quietly, and integrates seamlessly with existing Microflex microphone setups.

• Surface-mount mute control made for Microflex boundary and gooseneck microphones
• Selectable latched or momentary operation for flexible talk and mute behavior
• Logic terminals support local button use or remote control through third-party systems
• Touch-sensitive button with adjustable sensitivity for accurate response
• 5-pin mini XLR to block connector simplifies wiring; no soldering required
• Fits table surfaces 0.59 to 1.18 inches thick and ships with color rings for finish matching