AtlasIED EQM131 31-Band at 1/3-Octave Graphic Equalizer with Constant Q Filter

Optimize intelligibility and control across paging, sound masking and mass notification systems with the AtlasIED EQM131 1/3-octave graphic equalizer. Built for professional security, surveillance and monitoring applications, this 1RU AtlasIED EQM131 provides 31 ISO-centered constant-Q filters that minimize interaction while delivering precise correction curves. The low-noise, all-metal design preserves dynamic range so announcements, alarms and background masking remain clear and consistent.

Integrators will appreciate versatile connectivity—balanced XLR and TRS plus unbalanced RCA—making it simple to pair the EQM131 with amplifiers, mixers or the AtlasIED AA120M and AA-SMG masking modules. Front-panel LPF/HPF, level controls and a selectable ±6/±12 dB operating range speed setup and on-site adjustments. At 19" wide and 1RU high, the EQM131 mounts cleanly in rack systems used for facility-wide mass notification, paging, or AV monitoring rooms.

Spec your next project with the EQM131 to improve speech intelligibility and maintain consistent masking spectra across security and public address deployments. Contact sales or add the AtlasIED EQM131 to your rack order today.

• Deliver precise, intelligible paging and masking: 31-band 1/3-octave control sculpts audio for clearer announcements and reduced ambient noise impact.
• Minimize filter interaction with ISO-centered constant-Q design: creates accurate correction curves for security and monitoring environments.
• Flexible I/O for system integration: balanced XLR and TRS plus unbalanced RCA let you connect to amplifiers, mixers and mass notification modules easily.
• Rack-friendly, professional build: 1RU all-metal chassis and low noise floor ensure reliable performance in 24/7 surveillance and pro audio systems.
• Simple front-panel control: LPF/HPF and level trims plus selectable ±6/±12 dB range enable fast tuning during installation or live operation.