Monitor Audio Silver 9i loudspeaker Measurements part 2
Fig.5 Monitor Audio Silver 9i, lateral response family at 50", normalized to response on tweeter axis, from back to front: differences in response 90 degrees-5 degrees off-axis, reference response, differences in response 5 degrees-90 degrees off-axis.
Fig.6 Monitor Audio Silver 9i, vertical response family at 50", normalized to response on tweeter axis, from back to front: differences in response 15 degrees-5 degrees above reference axis, reference response, differences in response 5 degrees-15 degrees below axis.
In the time domain, the Silver 9i's step response (fig.7) is absolutely normal, with positive-going, non-time-coincident steps from the tweeter and the woofers. Some slight "furring" of the trace can be seen, due to the tweeter's high-amplitude ultrasonic ringing. These twin modes dominate the Monitor's waterfall or cumulative spectral-decay plot (fig.8). Apart from the mid-treble resonant modes of the two woofers, this plot is actually quite clean in the audioband, and suggests a detailed presentation.—John Atkinson
Fig.7 Monitor Audio Silver 9i, on-axis step response at 50" (5ms time window, 30kHz bandwidth).
Fig.8 Monitor Audio Silver 9i, cumulative spectral-decay plot at 50" (0.15ms risetime).