This pair of Yamaha NS-333 2-Way Bookshelf Speakers can function as both front and rear speakers. Its 5″ PMD cone woofer and 1″ aluminum dome tweeter set a sound stage that achieves impressive efficiency and dynamic range in any size space. Whether the listening occasion calls for a symphony orchestra or battlefield drama, this model can summon either with equal conviction in any two-channel or multi-channel audio system.