I love the thx system, my mom's mkc has the thx system and it is perfectly tuned. My mkc has the standard system and there is more bass with the standard system but impossible to tune just right especially the high end tones.
I can't recommend the THX audio system enough. Car systems need wattage and dynamic range and this system has plenty of both. I have't driven many cars n my 29 years on the road. But this is the best one I've experienced. Better than the Harman/Kardon systems in BMW and Subaru. A hair better than the Acura ELS Studio system found in the ILX sedan. It's that good.