HT Labs Measures
L/R Sensitivity: 90 dB from 500 Hz to 2 kHz
Center Sensitivity: 90 dB from 500 Hz to 2 kHz
Surround Sensitivity: 88.5 dB from 500 Hz to 2 kHz
This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the 802 Diamond L/R (purple trace), HTM2 Diamond center channel (green trace), 804 Diamond surround (red trace), and DB1 subwoofer (blue 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 802 Diamond’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +2.82/–2.79 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 31 Hz, and the –6-dB point is at 27 Hz. Impedance reaches a minimum of 3.67 ohms at 98 Hz and a phase angle of –54.11 degrees at 49 Hz.
The HTM2 Diamond’s listening-window response measures +3.92/–3.53 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +4.08/–3.58 dB from 200 Hz to 10 kHz. The –3-dB point is at 47 Hz, and the –6-dB point is at 41 Hz. Impedance reaches a minimum of 3.77 ohms at 99 Hz and a phase angle of –54.01 degrees at 5.8 kHz.
The 804 Diamond’s listening-window response measures +4.54/–4.82 dB from 200 Hz to 10 kHz. The –3-dB point is at 39 Hz, and the –6-dB point is at 29 Hz. Impedance reaches a minimum of 3.78 ohms at 99 Hz and a phase angle of –54.41 degrees at 4.7 kHz.
The DB1’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 15 Hz and the –6-dB point is at 13 Hz. The upper –3-dB point is at 133 Hz with the Low-Pass control set to None.—MJP
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Bowers & Wilkins
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