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This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the ES20 satellites (purple trace), ES250P subwoofer (blue trace), and ES25C center channel (green trace). All passive loudspeakers were measured with grilles at a distance of 1 meter with a 2.83-volt input and scaled for display purposes.

he ES25C’s listening-window response measures +4.31/–5.38 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +3.62/–6.47 dB from 200 Hz to 10 kHz. The –3-dB point is at 82 Hz, and the –6-dB point is at 64 Hz. Impedance reaches a minimum of 3.89 ohms at 14.4 kHz and a phase angle of –48.98 degrees at 4.2 kHz.

JBL ES20 Speaker System HT Labs Measures | Sound & Vision

Con esas mediciones, para los que busquen agudos "nítidos" previo a la EQ no pintan demasiado bien

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