Bookshelf speakers are not full range, however, they do provide a shallow part of the lower-end frequencies. But it can provide complete high and mid-level. For the full range, the speaker should be able to deliver all levels. But bookshelves can't deliver all levels completely. The bookshelves are not full range, and it is an asset for theater room owners. Because you can install separate subwoofers to fill the room with those lower frequencies. It helps you to better manage the bass.