Offering choice of filter settings in signal path, APx500 v4.1 supports full input bandwidth across all channels of 2-channel APx555 and APx525 and 16-channel APx586 analyzers. Users can access system's max input bandwidth across all channels of test system (1 MHz for APx555 and 525, and up to 90 kHz for APx586). Functionality also affords users control over Acoustic Response time window with auto or manual setting of start time and establishment of absolute time zero for measurement.