In these speakers, I am hearing some of the music instruments which I never did in my 30k car audio setup or home audio setup.
I can agree with that. I too, can hear certain detail better than a pair of calibrated studio monitors, but that's because some big chunks of the music are missing in the Soundsticks.
Compare the two response graphs attached. There are massive holes in the midbass and mid-treble region, and a moderate spike in the HF output (which is not a bad thing as it becomes linear when you move off-axis).
Both of these are taken in an untreated room, the HKs need calibration in order to get the sound linear - but you can't ever fill the midbass hole because the satellite drivers are too small. They will explode if you try and get rid of the 150Hz dip (some of that is due to the room, but the majority is in the speaker itself. At a minimum the 5k dip has to be equalised.
Another problem with these is the change in sound along its length due to massive spaces between drivers. In line arrays we try get the drivers as close as possible to prevent combing.
You can ignore the region below 200Hz because the room is untreated, but even then calibration gives very good results as you can see in the monitor results.
These are the sticks:
And these are the monitors