For incredible power and clarity, trust Mackie's HD1531 3-way high-definition loudspeaker. In designing the HD1531, Mackie applied their time-proven principles of amplification toward a true high-definition design. To achieve this, Mackie added their patented acoustic correction processing along with transducer time-alignment and phase-correction technology, to develop an extremely accurate loudspeaker. With 1,800 watts of efficient Class-D "Fast Recovery" amplification, an adjustable 3-band EQ,..