Tower Speaker Reviews

Sensitivity: 90 dB from 500 Hz to 2 kHz

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

The AT-1’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +1.38/–3.00 decibels from 200 hertz to 10 kilohertz. An average of axial and +/–15-degree horizontal responses measures +1.85/–2.95 dB from 200 Hz to 10 kHz. The –3-dB point is at 38 Hz, and the –6-dB point is at 31 Hz. Impedance reaches a minimum of 4.20 ohms at 203 Hz and a phase angle of –17.52 degrees at 120 Hz.—MJP