I just bought two active speakers B210D on board a reseller. Application: voice support for conferences from 20 to 100 people. You plug a good mic, the 220v is all. The sound is magnificent! Nice presence of all frequencies. The audience hears you remarkably without disturbing the hearing. If the hearing is important, I can plug the second B210D the output of the first to cover the back of the room or another room or even across the audience. Lightweight, sturdy, small size, a delight to handle. Even at volume "pushed", the sound will not clip. Occasionally, I wanted to make a configuration or a karaoke evening at home. And here too, B210D wonders. In this config, I use a Behringer 1222FX mixer purchased from OCCAZ. Wonderful! No noise or interference. You set your input, connect the source and then ... German technology does the rest. A delight. Its powerful (David Guetta tape plexus), net, clean, all frequencies are present, nice angle hearing, perfect to develop into a living. Unobtrusive to the eye, easy to carry in the car and put away in a cupboard, the active speaker can be recommended without fear. Of course, for deep bass, you add a subwoofer box.