Floorstanding Speaker Systems

L/R Sensitivity: 92.5 dB from 500 Hz to 2 kHz

Center Sensitivity: 90 dB from 500 Hz to 2 kHz

Surround Sensitivity: 87.5 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the TX-FS L/R (purple trace), THX-12SUB subwoofer (blue trace), THX-Center center channel (green trace), and THX-Dipole surround (red 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.

The TX-FS's listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.86/–1.61 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 94 Hz, and the –6-dB point is at 74 Hz. Impedance reaches a minimum of 4.14 ohms at 302 Hz and a phase angle of –27.73 degrees at 136 Hz.

The THX-Center's listening-window response measures +0.77/–3.20 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +0.78/–2.58 dB from 200 Hz to 10 kHz. The –3-dB point is at 75 Hz, and the –6-dB point is at 63 Hz. Impedance reaches a minimum of 4.46 ohms at 238 Hz and a phase angle of –36.64 degrees at 120 Hz.

The THX-Dipole's three-face averaged response measures +2.51/–4.97 dB from 200 Hz to 10 kHz. The –3-dB point is at 81 Hz, and the –6-dB point is at 67 Hz. Impedance reaches a minimum of 5.31 ohms at 15.2 kHz and a phase angle of –36.69 degrees at 114 Hz.

The THX-12SUB's close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 31 Hz and the –6-dB point is at 29 Hz. The upper –3-dB point is at 209 Hz.—MJP