Bookshelf Speaker Reviews

Sensitivity: 85 dB from 500 Hz to 2 kHz

This graph shows the quasi-anechoic (employing close-miking of all woofers) frequency response of the AT-2 (purple trace). The passive loudspeaker was measured with grill at a distance of 1 meter with a 2.83-volt input.

The AT-2’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +2.56/–2.75 decibels from 200 hertz to 10 kilohertz with the tweeter level switch set to “0.” An average of axial and +/–15-degree horizontal responses measures +2.30/–2.58 dB from 200 Hz to 10 kHz. The –3dB point is at 41 Hz, and the –6dB point is at 38 Hz. Impedance reaches a minimum of 6.13 ohms at 158 Hz and a phase angle of –51.20 degrees at 84 Hz. —MJP