I use a Klipsch subwoofer using LFE, which blends in perfectly with my set-up. Klipsch Subwoofer gain adjustment along with AVR Auto microphone, has been superb for both Music and DD Movies. I have the lower end of Klipsch subwoofer inventory, and can bring the walls down with clarity/distinction, but prefer gain in the middle of the road. Lower volume to my ears, is my cup of tea and not annoying/overdone, for my small room.
"Don't use Klipsch Subwoofers" I disagree in my application.