Tower Speaker Reviews

• CD 300 L/R Sensitivity: 86.5 dB from 500 Hz to 2 kHz

• CD 360 F Satellite 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 CD 300 L/R (purple trace), AS 300 SC subwoofer (blue trace), and CD 360 F satellite (green trace). All passive loudspeakers were measured at a distance of 1 meter with a 2.83-volt input and scaled for display purposes.

The CD 300's listening-window response (a five-point average of axial and +/–15-degree horizontal and vertical responses) measures +3.30/–0.90 dB from 200 Hz to 10 kHz. The –3dB point is at 61 Hz, and the –6dB point is at 48 Hz. Impedance reaches a minimum of 4.09 ohms at 4.3 kHz and a phase angle of –32.82 degrees at 162 Hz.

The CD 360 F's listening-window response measures +2.61/–2.10 dB from 200 Hz to 10 kHz. An average of axial and +/–15-degree horizontal responses measures +2.44/–2.33 dB from 200 Hz to 10 kHz. The –3dB point is at 121 Hz, and the –6dB point is at 104 Hz. Impedance reaches a minimum of 5.20 ohms at 3.9 kHz and a phase angle of –44.51 degrees at 174 Hz.

The AS 300 SC's close-miked response, normalized to the level at 80 Hz, indicates that the lower –3dB point is at 39 Hz and the –6dB point is at 30 Hz. The upper –3dB point is at 135 Hz with the crossover-frequency control set to maximum.—MJP