100% yes, standing up bookshelf. Still, it is almost impossible to get the center to match toe vocal timber of the mains. Even if it was identical, the environment for short time reflections is not. My experience, if you are sitting between the mains, the center is not only not needed, it is far worse. Much of that may be the artificial generation of the center channel as broadcast. You can do far more for voice centering and image control be reducing the main speaker sort time reflections ( sound absorbers on the front wall) My experience, your mileage may vary.