All speakers have a little EQ built in

Although many people attest that the analog EQ does not alter the sound trait in general, I am suspecious if that is true.

@lanx0003 - Fan though I may be of tone controls, this is not the blanket statement I would make. There are in fact bad tone controls and bad EQs. Sometimes this happens when a manufacturer takes excellent care in the audio circuit, but skimp in design on the extra parts for the tone controls. I had a Parasound P7 that was like this. An otherwise excellent multi-channel pre with a veil that would come over it when tone controls were engaged.

@dougsat I agree. Since building two pairs of open baffle, single driver speakers with no crossovers, I have found that they have virtues that sit them equal to my LS 50s, Klipsch heresy, ones, and AR 2AX’s. I also have measured my hearing and have a slight rolloff beginning at 4000 Hz and continuing through eight and above. Using Roon, I crafted a compensation curve and have been switching it in and out and come to the conclusion that I rather like it on most recordings. So a “flat response “is appealing in some cases butI have found that there are also things to be gained by allowing one self to move away and explore other avenues. 

@mashif....You got a bad unit or you have cheap speakers....The Loki is not brittle at all on top.....at least not with a decent system.

I have Altec 604Cs. Good speakers but they were not known for the crossover. I got a pair of Mastering Lab crossovers and had them refurbished with new caps. They have mid and upper shelving. Made a difference. 
 

My room is semi-anechoic.