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The tweeter does appear to be in a small (woefully small!) waveguide. I would like a much bigger and deeper one of course for better directivity control to lower frequencies, not just to a few kHz.
I can't figure out the waveguide thing, in the photos of the tweeter alone there appears to be none, in the photos of the tweeter in the box at appears that there is one. For example:
I think what used to be called a "recessed" dome with flat faceplate is now called a "waveguide" for marketing purposes. One can clearly see from the data there isn't much "guiding" going on.Some really puzzling drivers from Scan. The tweeter looks almost obscene. Nothing new either, as Audax made an elliptical dome eons ago.Sensitivities are decent, but both will require some filter parts to flatten response. The "directivity" control of the tweeter is at near useless frequencies. In fact, since the sound power will dive even more at HF, they could sound a bit "dark", with little air in some rooms. Kind of the opposite of a ribbon which typical exhibits that kind of vert/horz asymmetry.Oh well, at least they have the pricetags to attract the bling crowd.
Constant directivity from at least a low 1khz all the up to 8khz would be ideal, but then again, very few speakers manage that. And those that do are all well...big! Best,Anand.
Don't many speakers using Uni-Q drivers and the like achieve something like constant directivity between 1 and 8khz? They're not all very big, or rare. Unless I'm missing something (fort possible, as the French say).
I mispoke. I was specifically relating to waveguide designs. You can’t manage constant directivity down to a low frequency with a small waveguide. They get large real quick, like 12,15,18,24 inches, etc...
I’ve seen measurements on the Spatial M4, and sadly left unimpressed. The M3’s most likely are similar.
I mispoke. I was specifically relating to waveguide designs. You can’t manage constant directivity down to a low frequency with a small waveguide. They get large real quick, like 12,15,18,24 inches, etc...Coincident designs can exhibit constant directivity but their dispersion is much wider (ie, not as “controlled” as waveguides). It’s not right or wrong, it can affect how you treat your room. Getting coincident designs right is also difficult. KEF, ELAC, Soundfield Audio, TAD, etc...that is still a smaller group than the non constant directivity designs in the world of loudspeakers. I’ve seen measurements on the Spatial M4, and sadly left unimpressed. The M3’s most likely are similar.Let’s put it this way Neeko. Just because a company “claims” constant directivity, doesn’t mean they are. One should ask for the measurements to see the degree to which as well over what bandwidth they are constant. And whether a design uses coincident design, waveguides, horn, dipole, etc...means nothing to me anymore. Only because I have seen dramatically different executions and competence in design. If I am a paying client I want the truth, because well, I deserve it!Best,Anand.
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