At just 9 inches tall x 5 inches wide x 5.5 inches deep the SuperZero 2.1 is small. Unlike most small speakers, which try to fool you with boomy, pseudo-bass from a port, the Super Zero 2.1 acoustic suspension (sealed) enclosure skips the bass and focuses on making beautiful, lifelike midrange and high frequencies. Just like the original. Finish: Black high-gloss vinyl laminate. Cabinet Material: 12mm MDF with .5 mm vinyl laminate exterior. Weight: 5.8 lbs (2.6kg). Frequency Response: -3dB 85Hz - 20kHz. Sensitivity: 87dB. Impedance: 8 ohms nominal, 4.3 ohms min. Crossover: 2kHz, 12dB per oct. high and low-pass. Power Handling: 75W. Mounting Insert: .25 inch #20 threaded. Sold in singles.