The Allen & Heath M-AHM-64-AEC-A is a plug-in expansion module that adds 12 channels of advanced acoustic echo cancellation (AEC) to the AHM-64 audio matrix processor. Designed to enhance speech clarity in conferencing and remote communication environments it uses a 150 ms FIR adaptive filter automatic gain control (AGC) non-linear processing (NLP) background noise reduction and near-end gating. This module is ideal for AV integrators and system installers deploying AHM-64 in corporate education or government installations. 12 channels of acoustic echo cancellation (AEC) 150ms FIR adaptive filter Far-end automatic gain control (AGC) Residual echo non-linear processing (NLP) Background noise reduction and near-end gating Speech-shaped comfort noise output Plug-in expansion module for AHM-64 chassis