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JL Audio Fathom f113 Subwoofer HT Labs Measures
HT Labs Measures: JL Audio Fathom f113 Subwoofer
This graph shows the quasi-anechoic (employing close-miking of the woofer) frequency response of the Fathom f113 subwoofer (blue trace).
The Fathom f113's close-miked response, normalized to the level at 80 hertz, indicates that the lower –3-decibel point is at 18 Hz and the –6-dB point is at 17 Hz. The upper –3-dB point is at 111 Hz with the LP Filter switch set to off. Please note that the response begins to fall off above 60 Hz and therefore is not flat at our reference frequency of 80 Hz. When normalized to the level at 60 Hz, the lower –3-dB point is at 20 Hz, the –6-dB point is at 18 Hz, and the upper –3-dB point is at 93 Hz. —MJP
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