Bookshelf Speaker Reviews

Satellite Sensitivity: 87.5 dB from 500 Hz to 2 kHz

Center Sensitivity: 88 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the A 25 satellite (purple trace), A 225C center channel (green trace), and ASW 250 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 A 25’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +3.20/–2.55 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 73 Hz, and the –6-dB point is at 58 Hz. Impedance reaches a minimum of 5.07 ohms at 235 Hz and a phase angle of –45.60 degrees at 111 Hz.

The A 225C’s listening-window response measures +2.36/–3.75 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +2.55/–4.17 dB from 200 Hz to 10 kHz. The –3-dB point is at 86 Hz, and the –6-dB point is at 70 Hz. Impedance reaches a minimum of 6.78 ohms at 7.3 kHz and a phase angle of –41.48 degrees at 132 Hz.

The ASW 250’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 38 Hz and the –6-dB point is at 33 Hz. The upper –3-dB point is at 221 Hz using the LFE input.—MJP