Like its fellow EUROLIVE D Series loudspeakers, the EUROLIVE B210D PA speaker system features Behringer's special Class-D amplifier technology and internal switch-mode power supply to provide a much better power-to-weight ratio than other active speakers. Due to the high-efficiency design, the BEHRINGER EUROLIVE B210D speaker system cranks out 220 of the cleanest, punchiest audio Watts you've ever heard from a compact PA system. The integrated sound processor provides total system control, along with dependable protection of the LF and HF transducers, thanks to the built-in active high-pass filter, which virtually eliminate distortion-even at extreme operating levels. In addition, it features an Ultra-Low Noise (ULN) Mic/Line input with LEVEL control and a dedicated 2-band EQ (bass/treble) for easy control.Intelligent by designOne of the coolest things about active speakers is the lack of backbreaking racks of amps, crossovers, and EQs that are often required to make passive speaker systems sound almost as good. But that comes with a trade-offAithat extra weight is transferred to the loudspeaker, making it difficult for a single user to heave all that mass onto the top of a speaker stand.BEHRINGER's EUROLIVE D Series' "Intelligent-Design" merges the best features of active loudspeakers with significantly lower weight by using switch-mode power supplies and Class-D amplifier topology. Hidden deep inside the enclosure is the equivalent of an active 2-way electronic crossover, graphic EQ, parametric EQ, mic preamp, limiter, and two Class-D power amplifiers, yet the overall weight is less than a comparable loudspeaker system. These components work together seamlessly to provide optimum sound quality-and it all takes place automatically, without you having to touch a single knob.Class D Amplifier Technology delivers high power with low weightInstead of operating relatively continuously.