Bookshelf Speaker Reviews

Satellite Sensitivity:
84.5 dB from 500 Hz to 2 kHz

Center Sensitivity:
84 dB from 500 Hz to 2 kHz

Elevation Module Sensitivity:
84.5 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the SP-EBS73-LR satellites (purple trace), SP-EC73 center channel (green trace), the elevation module surround of the SP-EBS73-LR (red trace), and SW-E10 subwoofer (blue). 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 SP-EBS73-LR’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.99/–3.60 decibels from 200 hertz to 10 kilohertz. The –3dB point is at 59 Hz, and the –6dB point is at 49 Hz. Impedance reaches a minimum of 4.72 ohms at 609 Hz and a phase angle of +44.69 degrees at 4.2 kHz.

The SP-EC73’s listening-window response measures +1.75/–3.33 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +1.34/–3.81 dB from 200 Hz to 10 kHz. The –3dB point is at 66 Hz, and the –6dB point is at 58 Hz. Impedance reaches a minimum of 4.76 ohms at 640 Hz and a phase angle of +44.92 degrees at 4.2 kHz.

The elevation module’s driver-axis response measures +1.36/–4.25 dB from 200 Hz to 10 kHz. The –3dB point is at 141 Hz, and the –6dB point is at 120 Hz. Impedance reaches a minimum of 5.59 ohms at 338 Hz and a phase angle of +39.24 degrees at 3.7 kHz.

The SW-E10’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3dB point is at 32 Hz and the –6dB point is at 30 Hz. The upper –3dB point is at 124 Hz with the Lowpass control set to maximum.—MJP