Mackie Th-18S 18" Powered Subwoofer Mackie’s HD Series Powered Subwoofer delivers intense low-frequency extension and punch to any Mackie full-range system. Designed and tuned by the experts at EAW, HD Series subs incorporate a premium Linkwitz-Riley crossover, precision tuning filters and phase alignment for ultra-accurate bass response. Cabinets are all-wood and feature a ported, direct radiating design for chest-pounding punch. And Class-D amps and switching power supplies mean less weight and maximum efficiency. Use the HD1501 with an SRMv2 system or pair the HD1801 with HD Series Powered Loudspeakers for a powerful and fully high-definition PA solution. Designed by the same team that produced Mackie’s best-selling SRM450v2, the Mackie Thump TH-18s subwoofer delivers 1000-watts of room shaking Class-D power in a lightweight, portable design. The TH-18s provides amazingly accurate bass response and is a perfect match for the Mackie Thump TH-15A.

Features:
•1000W of ultra-efficient Class-D Fast Recovery™ amplification
•Mackie Active electronics provide total system optimization
•Precision crossover (125Hz)
•Tuning filters for accurate bass response
•18-inch woofer delivers superior output and low- frequency extension (aka Thump)
•Dual XLR inputs for mono or stereo applications
•Stereo high-pass and full range outputs
•User-adjustable level and polarity controls
•Individual power, signal, OL, and thermal protect indicators
•Pole receptacle for mounting full-range loudspeakers
•Solid plywood enclosure with high-durability, textured black paint
•Extremely lightweight and portable (73 lbs / 33.1 kg)