Alesis’ M1Active 520 USB are studio monitors with an internal digital-audio interface perfect for professional studio use. The 520’s are active, bi-amplified, two-way reference monitors that play from 20kHz to 56Hz to cover nearly all frequencies audible to human ears. You can take USB digital signal out of your computer via USB and input it to M1Active 520 USB for low-noise, low-distortion performance. The M1Active 520 USB perform with linearity, clarity, and neutrality typically reserved for the more expensive monitors. Delivering 30W per speaker these speakers are the ideal choice for any potential producer.