This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the ZVOX X-Base 575 (purple trace). The left channel was measured with grille at a distance of 1 meter.

The Z-Base 575’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures + 2.27/– 5.81 decibels from 200 hertz to 10 kilohertz. An average of axial and +/–15-degree horizontal responses measures +3.18/–6.01 dB from 200 Hz to 10 kHz. The –3-dB point is at 46 Hz, and the –6-dB point is at 39 Hz.—MJP

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