One of the coolest things about active loudspeakers is the lack of all the backbreaking racks of amps, crossovers and EQs that are often required to make passive systems sound almost as good. But that comes with a trade-off ''that extra weight is transferred to the loudspeaker, making it difficult for a single user to heave all that mass onto a speaker stand. By utilizing switch-mode power supplies and Class-D amplifier topology, the new EUROLIVE B312D and B315D loudspeakers provide 28% more output power (550-Watts) and still weigh 10% less than our best-selling B312A/B315A systems.Sound quality is also improved, thanks to an integrated sound processor, which provides total system control, dependable protection of the transducers (woofer and tweeter) and virtually eliminates distortion''even at extreme operating levels. In addition, both models feature an Ultra-Low Noise (ULN) MIC/LINE input with LEVEL control and a dedicated 2-band EQ (HIGH/LOW) for simple, yet effective tonal control Type: Sound and Recording