Energy Reference Connoisseur RC-70 Speaker System review:HT Labs Measures

L/R Sensitivity: 89 dB from 500 Hz to 2 kHz

Center Sensitivity: 86.5 dB from 500 Hz to 2 kHz

Surround Sensitivity: 82 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the RC-70 L/R (purple trace), S10.3 subwoofer (blue trace), RC-LCR center channel (green trace), and RC-R 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 RC-70's listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.38/–5.19 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 68 Hz, and the –6-dB point is at 48 Hz. Impedance reaches a minimum of 4.44 ohms at 144 Hz and a phase angle of –31.74 degrees at 98 Hz.

The RC-LCR's listening-window response measures +1.25/–4.52 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +1.06/–4.71 dB from 200 Hz to 10 kHz. The –3-dB point is at 57 Hz, and the –6-dB point is at 52 Hz. Impedance reaches a minimum of 4.05 ohms at 61 Hz and a phase angle of –25.52 degrees at 51 Hz.

The RC-R's three-face averaged response in dipole mode measures +1.62/–4.23 dB from 200 Hz to 10 kHz. The –3-dB point is at 73 Hz, and the –6-dB point is at 64 Hz. Impedance reaches a minimum of 4.95 ohms at 203 Hz and a phase angle of –42.64 degrees at 132 Hz.

The S10.3's close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 24 Hz and the –6-dB point is at 23 Hz. The upper –3-dB point is at 111 Hz with the X-Over Mode switch set to By-Passed.—MJP