Alesis Elevate 4, Active desktop studio speakers, 4'' Woofers, 1'' Silk tweeter, Power: 25 W per channel (Class A / B), Bass boost function, Frequency range: 68 - 20,000 Hz, Crossover frequency: 2 kHz, Specially adapted elliptical waveguide ensures a wide sweet spot and controlled dispersion, Connections: balanced 6.3 mm jack inputs, Unbalanced stereo RCA inputs, 3.5mm headphone output on the front, 3.5mm subwoofer output, Dimensions: 183 x 157 x 235 mm, Weight: 2.3 kg