Onkyo HT-S9400THX Home Theater in a Box HT Labs Measures

HT Labs Measures

Two channels driven continuously into 8-ohm loads:
0.2% distortion at 106.3 watts
1% distortion at 113.5 watts

Two channels driven into 4-ohm loads:
0.2% distortion at 131.4 watts
1% distortion at 145.6 watts

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the L/R satellite (purple trace) and subwoofer (blue trace). The passive loudspeaker was measured at a distance of 1 meter with a 2.83-volt input.

The satellite’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +2.56/–0.72 decibels from 200 hertz to 10 kilohertz. The –3dB point is at 110 Hz, and the –6dB point is at 96 Hz. Impedance reaches a minimum of 6.83 ohms at 6.2 kHz and a phase angle of –44.92 degrees at 111 Hz. Sensitivity averages 87 dB from 500 Hz to 2 kHz.

The subwoofer’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3dB point is at 20 Hz and the –6dB point is at 17 Hz. The upper –3dB point is at 102 Hz.

Crosstalk at 1 kHz driving 2.83 volts into an 8-ohm load was –80.11 dB left to right and –83.74 dB right to left. THD+N from the amplifier was less than 0.008% at 1 kHz when driving 2.83 volts into an 8-ohm load. The signal-to-noise ratio with an 8-ohm load from 10 Hz to 24 kHz with “A” weighting was –105.88 dBrA.—MJP

Video Test Bench
Video-wise, the HT-R990 tested wonderfully, even better than some AVRs that cost considerably more. The Qdeo video processor delivered excellent scaling (though I didn't have the opportunity to try the 4K upscaling), and it demonstrated exceptional deinterlacing for film and video sources. It also passed above white and below black with no clipping.

3:2 HD 2:2 HD MA HD 3:2 SD 2:2 SD MA SD VIDEO CLIPPING LUMA RESOLUTION CHROMA RESOLUTION SCALING
PASS PASS PASS PASS PASS PASS PASS PASS PASS EXCELLENT

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