Tower Speaker Reviews

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

Center Sensitivity:
93 dB from 500 Hz to 2 kHz

Surround 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 Amerigo L/R (purple trace), A-Center center channel (green trace), and Anima 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 Amerigo’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.93/–4.23 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 42 Hz, and the –6-dB point is at 34 Hz. Impedance reaches a minimum of 6.34 ohms at 97 Hz and a phase angle of –55.99 degrees at 30 Hz.

The A-Center’s listening-window response measures +1.23/–1.16 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +1.14/–2.18 dB from 200 Hz to 10 kHz. The –3-dB point is at 70 Hz, and the –6-dB point is at 58 Hz. Impedance reaches a minimum of 3.85 ohms at 4.0 kHz and a phase angle of –40.71 degrees at 111 Hz.

The Anima’s listening-window response measures +2.25/–5.99 dB from 200 Hz to 10 kHz. The –3-dB point is at 72 Hz, and the –6-dB point is at 60 Hz. Impedance reaches a minimum of 4.26 ohms at 3.4 kHz and a phase angle of –41.71 degrees at 111 Hz.—MJP