yayu

I have the same headphones as you, here are some eq profiles:
 Philips SHP9500 ParametricEQ.txt this one needs -8.7 pre amp. Credits to the AutoEq project https://github.com/jaakkopasanen/AutoEq
https://www.dropbox.com/s/sc2wanrbrqe0qn7/Philips SHP9500.pdf?dl=0 Credits to Oratory1990 https://www.reddit.com/r/oratory1990/wiki/index
 
To apply the first one, you simply need to download the .txt and import it from Peace, then set the preamp value. The second one you have to manually enter the values. Please note that the second one uses a low shelf filter, so you will need to set that too. They both target the same curve, the difference is that the first one is achieved by a program (https://github.com/jaakkopasanen/AutoEq) and the second one was done manually by a person. I personally prefer the first one as it sounds more detailed on the treble, but that is subjective so try for yourself if you wish. The AutoEQ profile (the first one) differs a bit from the one posted on github because I allowed it to use a higher max gain, improving the results on the bass frequencies. The con of this is that the preamp is now -8.7 instead of -7.4, meaning that the volume level will be somewhat lower and you'll have to turn it up some more. You did mention that with the eq you were using things sounded too low, so maybe these settings are not ideal either since they do take a hit in volume too. A thing I would do is that if you have a realtek sound card, go to its control panel and check if there's some setting to change the output gain, or something along those lines. Set it higher if the volume is low. Otherwise, you might have to consider an amp or live without eq. It might be tempting to leave preamp at 0 altogether but try not to since this would cause clipping, distortion. If you can't afford to sacrifice 8.7 db because the volume becomes too low then this one Philips SHP9500 ParametricEQ-alternative.txt only requires you to apply -6.4db preamp. It is essentially the same as the one on the github results, so it has slightly less bass and more treble compared to the other result. Again, this is all subjective so you might even like this one better. I still recommend the first one though as that is the one that sounded the most natural to me. 
 
If -6.4 is still too much, I can make one with less preamp, but it won't be nearly as good in the bass region.
 
So how does the eq compare to the headphones by default? The highs, which I did not find annoying but might be too much for some songs are tamed, and the bass becomes way more present, but not to the point where it's ovedone. It becomes far less fatiguing to listen to the headphones and in general just sounds natural. Don't know anything about hesuvi and how its virtual surround works so I can't help you there. Anyways hope this helps, and feel free to ask if you need that profile with the lower preamp.