Mackie MP 220 Dual Dynamic Driver Professional In Ear Monitors Available At Local Warehouse Universal power supply (100 240VAC) with Stereo Inputs 4 SuperAnalogue Universal power supply (100 240VAC) with Power Factor Correction for stable operation even with unstable AC power The USB Pre II takes instrument or mic level signals and converts them with a 32 bit ADC containing sample rates from 44 The over ear design ensures an uninterrupted performance while the dual precision tuned dynamic drivers provide deep low end and enhanced vocal clarity MP 220 dual dynamic driver professional in ear monitors feature specially molded enclosures for an ergonomic fit providing hours of comfort and superior noise isolation