The Behringer Media 40USB Monitors feature a bi-amplified design that combines class-D amplification with 4” woofers and 0.75” tweeters. The 40USB active monitors deliver crystal-clear audio reproduction with a linear frequency response, crystal-clear highs and distortion-free bass responses. The 1/4” TRS and RCA input connectors are suitable for a range of audio sources while the USB connector allows you to connect the Behringer 40USB monitors directly to your computer.