Mackie MR5 Reference Monitor (Single Speaker) Minimum-diffraction molded baffle for smooth, wide sweet zone Precision Class A/B amplifiers with Active protection circuits: 55W for LF / 30W for HF HF and LF acoustic controls for room correction Balanced XLR, TRS and unbalanced RCA inputs Ultra-low distortion 5.25-inch steel frame LF transducer, Waveguide loaded 1-inch high-resolution HF transducer