Measurements DALI Opticon 6 MK2
Contents
We measured the DALI Opticon 6 MK2, of course. The response measurements were done with software from Illusonic. The microphone is a DPA 4091. As an interface we use an Audient ID14. We measure at 1 meter on-axis, 1 meter off axis and at 2.5 meters off axis. To exclude reflections, we set a window (3ms / 15ms / 30ms). Measurements below 200 Hz are not very reliable, because we measure in room. Keep that in mind. The impedance and phase measurement is done on a Sourcetronic ST2829A LCR meter.
Measurements DALI Opticon 6 MK2
Surely we see a slightly popular tuned speaker. The bump in the high frequencies we find more and more often. It gives air and lightness, but can also give sharpness in certain cases. So be careful when matching. We guess that the boost – about 2dB between 4 kHz and 9 kHz when we measure on the listening position – just helps commercially. But anyway: that is an assumption.
Distortion is low for a speaker in this class. From 45 Hz the distortion dips below 1% in our measurements. And there it stays. We see a slight peak around 190 Hz (well below 1%) that also returns at 570 and 950 Hz. That’s a harmonic. We also see it coming back off-axis and at a distance. In theory, this could also be a floor reflection, or comb filtering / interaction between the two units. All in all, the distortion is low enough that it does not bother us.
Impedance DALI Opticon 6 MK2
The impedance curve is very friendly. We see no dips at all, which makes the speaker suitable for a lot of amplifiers, including tubes, since the two peaks are only in the low end (bass reflex resonances). All in all, it is technically a good speaker with slightly commercial tuning. We honestly hope that this will not become the new trend at DALI and other manufacturers.