4-ohm setting with 8 ohm speakers


I have the Nightingale CTR.2 open baffle speakers. The manufacturer claims that "the Concentus CTR-02's speakers and crossover are designed and assembled on the acoustic screen following a scheme meant to guarantee that the impedance stays linear as the frequency changes."

However, with every amplifier used with these speakers, a 4-ohm setting sounds more natural and relaxed. Now I am listening them with the Hans Labs KT-88 power amplifier. With the 8-ohm setting, the sound is more tight, bland and stringent, it sounds more like a mid-level SS amplifier. I am wondering how this can be explained from technical point of view?
transl
This doesn't make sense to me and what Arnettpartners said doesn't make sense either. So just accept it as one of those weird audio interaction anomalies that works for some unexplained reason. Perhaps the maker of your amp or the maker of the speakers could shed some light on this.

Personally I wouldn't lose sleep over it. I'd just use the amp on whichever speaker taps sound best with your speakers. Surely it won't hurt anything.

If you find out the actual reason down the road shoot me an e-mail and let me know.
I have experienced this too. I believe it comes down to personal preference.
I am not sure it is possible to construct a speaker with a constant impedance, I have never seen one tested that did not have some variation. Their statement sounds like typical hype to me.
Clear. I will not bother with the theory any more and will listen to what seems best.