The Bang & Olufsen BeoLab Penta 3 are high-powered, active loudspeakers with a built-in amplification that delivers a true home theatre experience. These stereo speakers have a sleek, modern tower design that complements most rooms. These Bang & Olufsen main speakers have a stainless steel cabinet finish increased durability. In addition, these Bang & Olufsen main speakers offer optimal performance with three-way construction suitable for both indoor and outdoor usage. These stereo speakers consist of three drivers that include a tweeter dome for high frequencies, a woofer for low frequencies, and a midrange from all other in-between sounds. The Bang & Olufsen BeoLab Penta 3 offers a frequency response range from 38 Hz to 20 kHz and a sensitivity of 103 dB to ensure high quality sound output. The dimensions of these Bang & Olufsen main speakers are 22 cm wide by 165 cm high by 34 cm deep (8.66 inches by 64.96 inches by 13.38 inches), and they have a weight of 12 kg (26.45 lbs).