Best overall system design practice always includes a high-pass filter in the signal chain before the driving amplifier to protect the loudspeaker from over-excursion below box tuning or in the case of a distributed constant voltage installation, to pr otect the driving amplifier from the ill-effects of transformer saturation. The ZX1i-T incorporates patented ASC (Automatic Saturation Compensation) technology to prevent transformer saturation at low frequencies. Unlike typical transformer equipped lo udspeaker systems, an installation of Electro-Voice ZX1i-T loudspeakers does not require the high-pass filter frequency to be raised as more loudspeakers are added to the line because the driving amplifier is protected by ASC from saturation-induced ov erload, distortion, and possible failure. Best of all, there is no perceivable difference in sound quality between transformer and non-transformer versions of ZX1i loudspeakers. The same 50 Hz high-pass filter is used for both, regardless of the number of loudspeakers on the line.
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