These 5.25" Adatto Indoor/Outdoor Speakers (White) from BIC America feature the same tweeters and woofers as the company's "Top-Rated" DV52si bookshelf speakers. Their 5 1/4-in. woofers deliver full-range output to below the built-in subwoofer crossover point for Dolby Digital receivers. They include both cloth indoor and anodized screen outdoor grilles. The keyholes on the back of Adatto cabinets enable easy wall or corner mounting without having to purchase extra mounting brackets. They are ideal for home theater use, and all music formats.