"Our new HD Series loudspeakers are on the cutting-edge of loudspeaker technology," said Greg Young, Mackie brand product manager. "With the addition of the subs, you can have a complete high-definition system unlike anything else in the marketplace."
The HD1501 and HD1801 benefit from 15-inch and 18-inch woofers respectively, as well as Mackie's active electronics. The HD1801 18-inch subwoofer is designed for use with either the HD1521 or HD1531, and the HD1501 15-inch sub is for systems using SRM450v2 Active Loudspeakers (or SRM350v2s).
(Jim Evans)