These Bose wall-mount outdoor stereo speakers deliver balanced stereo sound over a much wider area than most conventional outdoor speakers. The innovative Bose 251 speakers use an Articulated Array™ speaker design to produce an extremely wide sound field. Each outside speaker cabinet houses two speakers set at precise angles so you experience consistent stereo effects as you move around outdoors. And the unique multi-chambered design of the Bose 251 exterior speaker cabinet minimizes audible distortion from low frequencies, for sound with clear, natural impact. And these award-winning exterior speakers are guaranteed to withstand harsh weather.