BDM400 Intelligent Paging Microphone

Paging microphones for public address announcements

The Baldwin Boxall Intelligent Paging Microphone is designed to be easy to use and provide clear public address (PA) announcements.

All microphones in the range can be used on a VIGIL voice alarm system for non-emergency, live-speech announcements. They can also be used with our new Eclipse5-PA system.

Dynamic cardiod microphone capsule, ‘speak now’ indicator and zone fault indicators are just a few of the features of the Intelligent Paging Microphone.

An option for factory fitted, flip-top buttons to be added is available – enabling a user to broadcast DVA (digital voice announcement) messages from the microphone.

Available from 1-zone up to 32-zone, the BDM400 range is black with silver text and is designed for efficiency and comfort in the working environment. The ergonomic design features a stylish overlay, which protects the buttons and display indicators and enables custom zone button labels to be conveniently and safely added.


  • Available in six versions from 1-zone up to 32-zone Communicate with the main control system via an RS485 link
  • A standard RJ45 (CAT5 network) cable is used to carry both audio and serial data
  • Microphones can be linked together via wall sockets (BMS8) and connected to a single input at the control rack
  • The BDM401 can also be operated as a parallel microphone. This option is selected internally by jumpers (the default factory setting is for serial operation)
  • Ergonomic design with all buttons and indicators mounted behind a stylish overlay that allows zone button labels to be inserted and protected
  • The dynamic cardioid microphone capsule can be set for either monitored or unmonitored use during configuration
  • ‘Zone Status’ indicators show if a zone is currently selected or in use
  • ‘All Call’ paging (except BDM401)
  • ‘Speak now’ indicator to show the user when a preannouncement chime has finished
  • A simple bar graph display shows the user the current speech volume, ensuring a clear announcement is made
  • ‘Data’ and ‘DC’ indicators to show the unit is functioning correctly
  • Zonal fault indicators are included to show when a fault is evident on the system
  • Fault Accept button
  • Option to fit flip-top switches to enable Digital Voice Announcement (DVA) messages to be broadcast

48mm x 177mm x 148mm
1.02 kg

48mm x 177mm x 148mm
1.02 kg

48mm x 177mm x 148mm
1.04 kg

48mm x 177mm x 275mm
1.48 kg

48mm x 177mm x 398mm
2.0 kg

48mm x 177mm x 523mm
2.0 kg

RAL 9005 Finish

Key Benefits

Safe & Compliant

EN54 Certified

BS EN 54: Fire Detection & Fire Alarm Systems, is a mandatory standard that specifies requirements and laboratory testing for every component of fire detection and fire alarm system.

UKCA UK Conformity Assessed

UKCA (UK Conformity Assessed) marking on products replaces CE marking in the UK and requires that certification of construction products, such as VACIE / Voice Alarm Control & Indicating Equipment is performed by a UK-based approved body.

British Standards BS5839-8 Code of Practice
BS 5839-8 is a BSI Standards Publication code of practice providing recommendations for the design, installation, commissioning, and maintenance of voice alarm systems that automatically broadcast speech or warning tones, in response to signals from their associated fire detection and fire alarm systems.

Documentation & Downloads

Looking for something in particular?

Search our full database of downloads and documentation


Added peace of mind with our 7-Year Warranty*

When it comes to the systems you rely upon to keep lives safe, complete confidence is the very least you should expect. That's why all new manufactured Baldwin Boxall products come with a manufacturer 7-year warranty as standard.
Learn More
7 Year Warranty

Microphones for Voice Alarm (VA) & Public Address (PA)

Touch Control

User-configurable, large format touchscreen Graphical User Interface (GUI) enables graphical control of our VIGIL3 and Eclipse5 systems. Upload logos, background images, edit buttons and much more.

Touch Control

Easy-to-use microphone with a touch sensitive screen for full control of a VIGIL3, VIGIL2, Eclipse4 or Eclipse5 system. Multi-function: NFC log in, select & route background music, emergency control mode and more. 

Fire Microphones

Baldwin Boxall Emergency Fire Microphones are housed in a robust, lockable steel enclosure and include a rugged, fist-held microphone console. Wall mountable and rack mounting units available.

Paging Microphones

BDM400 range of intelligent PA microphones with a variety of features to suit all installations. Suitable for connection to any of our voice alarm or public address systems – including VIGIL3 & Eclipse5.

Ambient Microphones

Ambient Noise Sensors (ANS) continually monitor the noise level (in a zone/area) and automatically adjust the volume of system broadcasts to that area – thus ensuring audibility at all times. Connect as part of any of our voice alarm systems.

Room Panels

Control Panels enable local control of audio facilities such as volume adjustment, music source selection and microphone input.

Make An Enquiry

Make An Enquiry (#13)
Scroll to Top
Our Revolutionising New EVC System


Streamline protocols with unmatched connectivity, versatility, and sustainability.