B&W Nautilus 805 loudspeaker Measurements part 2
Fig.4 B&W Nautilus 805, anechoic response on tweeter axis at 50", averaged across 30 degrees horizontal window and corrected for microphone response, with the complex sum of the nearfield woofer and port responses plotted below 300Hz.
The lateral dispersion (fig.5) is superbly well controlled, with only a slight amount of beaming apparent at the top of the woofer's passband. No wonder LG was so impressed with this speaker's imaging specificity! LG did find the balance to change significantly when he stood up, however, and fig.6 reveals that significant suckouts develop in the crossover region more than 5 degrees above or below the tweeter axis. Use of appropriate stands is mandatory with this speaker.
Fig.5 B&W Nautilus 805, 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 B&W Nautilus 805, vertical response family at 50", from back to front: differences in response 45 degrees-5 degrees above HF axis, reference response, differences in response 5 degrees-45 degrees below HF axis.