The Shure A400MB is a low-profile touch mute button that installs into a table or lectern surface, adding local or logic-controlled muting to a Shure MX395-LED or MX400SMP installation. Six DIP switches configure toggle or momentary action, push-to-mute or push-to-talk, LED colour logic and four touch-sensitivity levels, and it runs on the microphone’s 48V phantom feed, drawing just 5mW.
Features
Touch mute button for MX395-LED and MX400SMP installations
Toggle/momentary, push-to-mute/push-to-talk via DIP switches
Integrated LED with configurable talk/mute colours
Local mute or logic-out for control systems
Powered from 48V phantom, 5mW draw
Fits surfaces 15-30mm thick via a 30mm hole
NoteShure’s guide lists compatibility with the MX395-LED and MX400SMP specifically, check with us before specifying it against other Microflex models.
Specifications
| Type | Touch mute button |
| SKU | A400MB |
| Compatible mics | Shure MX395-LED, MX400SMP |
| Configuration | 6 DIP switches |
| Power | 48V phantom (via host mic), 5mW max |
| Mounting | 30mm hole, 15-30mm surfaces |
| Weight | 113g |
| Included | Mute button, plug-on adapter, spacer, 3 colour rings |





