hi, it seems that my sweet spot for getting the full wallop from my subwoofer is about 25 ft from away. this is at the end of my room. my usual listening position is about 10 ft. knowing that the wavelength is pretty long, is there a way of listening at 10 ft and still feeling the full impact? at the moment i can turn it loud. but even then i could not get the same punch as from 25 ft and at lower volume. any advice will be appreciated.