Of course, one can EQ this region up and flatten the whole response. The speakers then sound better balanced. But midrange EQ of speakers really works best when it is a matter of very small tweaking of a balance with which one is basically happy to begin with. Making major shifts in balance by EQ is a tricky matter. The main point is that when the measured response of the Epicon 6 was flattened out, the sound changed a lot. This sort of broadband balance-change is really fairly major, though it may look small on a graph. It changes the sound of the music quite a bit.
The 1–2KHz suckout must have been a deliberate decision on the part of DALI, and I think many people will like it. So much material in the world is over-recorded that a bit of backing away from it can be all to the good. But the exact sound of instruments really is altered here. And even the apparent volume of notes can shift. On Moravec’s Debussy collection on Vox, one could notice in careful listening the slight droop in volume as he ran from below on up through the recessed range to the very top notes (which are higher than that, being 4186Hz), with the top notes coming back up in level.
This is not to say that the speaker is colored in the resonant sense. Actually, it sounds very smooth and non-resonant. What it does not sound is exactly flat.
While you may well like this, you should observe the effects carefully when you audition the speaker to be sure that you do.
The DALI Epicon 6 is an extraordinary speaker. In high- frequency performance, in perceived resolution, and in absence of cabinet effects it is in the top echelon and it really does make one wonder about the heroic measures that have come to be the most common approach to obtain these goals. Clearly a lot of thought has gone into this speaker, and avoirdupois has been kept under control without giving up any of the resolving power noted: no cabinet problems, but moderate cabinet size and weight. And most striking of all, the Epicon 6s really do seem to have crossed a barrier in low distortion in dynamic-driver speakers. This is truly historic. And I hope other driver manufacturers will look into licensing the patent from DALI. Once heard, never forgotten.
With all that said, you still have to listen for yourself as with any speaker, to the exact radiation pattern and tonal balance choices here. The Epicon 6s involve a distinctive approach on these matters and whether that approach pleases you you’ll have to decide for yourself. But in any case, this is a speaker that everyone ought to hear. Things this important do not come along very often. Congratulations on those low-distortion drivers are very much in order. In the words of Schumann writing about the music of Chopin: “Hat’s off, gentlemen. A genius.”
Type: Floorstanding bassreflex loudspeaker
Driver complement: Two 6" bass/mid wood fiber cones, one 29mm soft textile dome, one 10 x 55mm ribbon
Crossover frequencies: 700Hz, 2550Hz, 15kHz
Frequency range: 35Hz to 30kHz
Maximum SPL: 110dB
Nominal impedance: 5 ohms
Weight: 66 lbs. each (net)
Dimensions: 9.1" x 40.3" x 17.4"
Price: $13,495–$13,995 (depending on finish)
The Sound Organisation (U.S. Distributor)
159 Leslie Street
Dallas Texas 75207