Tower Speaker Reviews

L/R Sensitivity: 90.5 dB from 500 Hz to 2 kHz

Center Sensitivity: 89.5 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 RTi A9 L/R (purple trace), DSW Pro 600 subwoofer (blue trace), CSi A6 center channel (green trace), and FXi A6 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 RTi A9’s listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +0.61/–2.91 decibels from 200 hertz to 10 kilohertz. The –3-dB point is at 49 Hz, and the –6-dB point is at 40 Hz. Impedance reaches a minimum of 4.49 ohms at 67 Hz and a phase angle of –49.39 degrees at 22 Hz.

The CSi A6’s listening-window response measures +2.17/–2.65 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +2.06/–3.58 dB from 200 Hz

to 10 kHz. The –3-dB point is at 73 Hz, and the –6-dB point is at 63 Hz. Impedance reaches a minimum of 4.63 ohms at 5.3 kHz and a phase angle of –34.92 degrees at 105 Hz.

The FXi A6’s three-face averaged response in dipole mode measures +1.87/–3.60 dB from 200 Hz to 10 kHz. The –3-dB point is at 75 Hz, and the –6-dB point is at 61 Hz. Impedance reaches a minimum of 4.22 ohms at 9.4 kHz and a phase angle of –36.14 degrees at 108 Hz.

The DSW Pro 600’s close-miked response, normalized to the level at 80 Hz, indicates that the lower –3-dB point is at 44 Hz and the –6-dB point is at 31 Hz. The upper –3-dB point is at 100 Hz using the LFE input with controls at their defaults.—MJP