Designed by the same team that produced Mackie's best-selling compact active loudspeakers, the THUMP TH-15A Active Loudspeaker provides amazingly accurate response from 20kHz all the way down to 40Hz, giving it just the right amount of punch. All-new Class D circuitry drives its custom, high-precision 15-inch woofer to greater volumes with less heat than is possible with competing designs. Onboard electronics include full system protection packed into a durable polypropylene enclosure, making TH-15A the most lightweight powerhouse in its class.