Dynaudio Contour 3.3 loudspeaker Measurements part 2

Fig.4 shows how the big Dynaudio's response changes as you move up or down from the tweeter axis. Sit so you can see the top of the cabinet (a very high chair) and a deep suckout appears in the upper crossover region. But sit below the tweeter, as WP did in his auditioning, and the mid-treble depression fills in, giving the response shown in fig.5. Yes, there are still small peaks and dips, but the overall trend is now flat across the band.

Fig.4 Dynaudio Contour 3.3, vertical response family at 50", normalized to response on tweeter axis, from back to front: differences in response 15 degrees-5 degrees above-axis; reference response; differences in response 5 degrees-10 degrees below-axis.

Fig.5 Dynaudio Contour 3.3, anechoic response on midrange axis at 50", averaged across 30 degrees horizontal window and corrected for microphone response, with the complex sum of woofer and port responses plotted below 150Hz without foam in ports.

In the horizontal plane, the Contour 3.3's output to the speaker's sides (fig.6) is well-controlled, though there is not much off-axis energy apparent above 10kHz—typical behavior for a fairly big soft-dome tweeter. There seems to be an excess of off-axis energy in the mid-treble, but this is actually due to the on-axis depression filling in to the sides. This is more easily seen in fig.7, which shows the actual responses (fig.5 just shows the differences) between each off-axis response and the reference response on the tweeter axis).

Fig.6 Dynaudio Contour 3.3, horizontal 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.7 Dynaudio Contour 3.3, horizontal response family on tweeter axis at 50", from back to front: responses 90 degrees-5 degrees off-axis; reference response; responses 5 degrees-90 degrees off-axis.

Company Info
Dynaudio
3043 N. Rose St.
Franklin Park, IL 60131
(847) 288-1767
Article Contents
Share | |
Site Map / Direct Links