The Boston Acoustics Classic Series 23 II 2-Way Bookshelf Speaker provides exceptional audio for any home theater or music system at an affordable price. A Kortec soft dome tweeter delivers crisp high frequencies while a graphite-injected DCD (Deep Channel Design) woofer delivers more bass response from less amplifier power. Together, the tweeter and woofer are able to reproduce frequencies ranging from 120 Hz to 20 kHz, ensuring faithful playback.