Bookshelf Speaker Reviews

Satellite Sensitivity: 88 dB from 500 Hz to 2 kHz

Center Sensitivity: 89 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close- miking of all woofers) frequency response of the 805D satellite (purple trace), HTM4 center channel (green trace), and ASW 12CM 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 805D’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +4.84/–2.06 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 46 Hz, and the –6-dB point is at 41 Hz. Impedance reaches a minimum of 5.54 ohms at 203 Hz and a phase angle of –55.94 degrees at 93 Hz.

The HTM4’s listening-window response measures +3.43/–3.40 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +3.39/–3.12 dB from 200 Hz to 10 kHz. The –3-dB point is at 47 Hz, and the –6-dB point is at 42 Hz. Impedance reaches a minimum of 5.44 ohms at 203 Hz and a phase angle of –65.79 degrees at 93 Hz.

The ASW 12CM’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 21 Hz and the –6-dB point is at 16 Hz. The upper –3-dB point is at 164 Hz with the Bass Extension switch set to A, the EQ switch set to A, and the Low-Pass switch set to Out.—MJP