To the purist adding a subwoofer is a bit cringe making, it has the charisma of a small fast car filled with bass drivers. However the good subwoofers do seem to add additional pleasing harmonics not only at the bottom end but also through to the mid range putting muscle into the music. I have been pleasantly surprised and have added other subwoofers to my main system. the secret is to use them as discretely as possible.