The AcousticPure Bookshelf Speakers are passive hi-fi bookshelf speakers offering audiophile sound quality in a compact form. With a 5.25-inch mid-woofer, 1-inch tweeter, 2-way crossover network, and a genuine cherry wood veneer cabinet, they deliver detailed, musical sound. Pairing beautifully with amplifiers from 20 to 150 watts, these speakers produce a wide, precise soundstage that rewards careful listening. Sold as a matched pair with calibration certificate.