Kanto YU2 2Way Powered Desktop Speakers, Bamboo. Class D Amplifier, 100W Peak Power. Acoustic grade MDF cabinets, rear bass port. Each speaker measures 3. 9'' W x 5. 3'' D x 5. 9'' H. 4 Ohms Nominal Impedance, 84 dB Speaker Sensitivity. For extra bass, hook up a subwoofer via the SUB OUT port. 3" composite drivers and 3/4 silk dome tweeters provide detailed midrange and crisp highs. Active to passive knurled speaker binding posts. 80 Hz 20 kHz Frequency Response, 2way Crossover System, 2. 5 kHz Crossover Frequency. AC 100V 240V 50/60 Hz universal power supply. Along with a 3. 5mm AUX input, YU2s builtin soundcard allows you to stream highquality audio directly from your computers USB port. 450 mV Input Sensitivity, < 0. 1% Total Harmonic Distortion. Weight: 3. 1 lbs. (active), 2. 9 lbs. (passive). Two Year Manufacturer's Warranty. Active speaker weighs 3. 1 lb (1. 4 kg), Passive speaker weighs 2. 9 lb (1. 3 kg). Listen and Believe.