AtlasIED EQM131 1/3 Octave Graphic Equalizer for PA and Masking

The AtlasIED EQM131 is purpose-built for AV integrators and system designers who need reliable, cost-effective equalization in sound masking and public address installations. Its ISO-centered, bandwidth-constant Q filter design keeps adjacent filter interaction to a minimum while remaining broad enough to shape correction curves for intelligibility and masking spectrum control — making it a practical tool for tuned installs rather than a compromise product.

With rear-panel XLR, balanced TRS, and unbalanced RCA connections, the EQM131 drops into virtually any signal chain without adapters or format converters. Front-panel HPF/LPF switches, output level control, and a +/-6 or +/-12dB operating range give the operator direct control over the EQ's headroom and correction depth without entering a menu. For integrators deploying AtlasIED AA120M mixer amplifier systems with the AA-SMG sound masking module, the EQM131 slots directly into that workflow, shaping the masking spectrum independently of paging and music inputs so summed sources don't corrupt the masking curve.

All-metal construction and a low noise floor make this unit suitable for permanent rack installations where reliability and signal integrity matter long-term. The three-year warranty backs it for commercial deployment in education, corporate, and hospitality environments where serviceability expectations are high.