Get superb audio quality at all frequency levels with the flat on-axis frequency response feature of the Energy Speakers CB-20 speaker. The wide and constant dispersion feature of this 2-way book-shelf speaker offers a well distributed sound throughout your room. With low distortion and resonance, this Energy Speakers stereo speaker provides clear, clean, distortion-free sound. The Energy Speakers CB-20 speaker has a 1-inch dome tweeter that delivers realistic sound with smooth highs. The 6.5-inch woofer of this 2-way book-shelf speaker offers skull-shattering bass. The impedance of 4 Ohms (minimum) and 8 Ohms (nominal) in this Energy Speakers stereo speaker produces dynamic and rich sound even with a low voltage appliance. The Energy Speakers CB-20 speaker has a 92dB sensitivity providing cinema-like loud sound.