Mackie has introduced two new high-definition loudspeakers, the 1800W HD1531, and 1600W HD1521. Both speakers incorporate the companyís acoustic correction processing that delivers transducer time alignment and phase correction, and features a 15-inch neodymium woofer with 3-inch voice coil, and a 1.75-inch titanium compression driver with heat-treated titanium diaphragm. Also integrated is Mackie
