Designed to complement any full-range PA loudspeaker and a perfect companion for the PreSonus® ULT12 and ULT15, the ULT18 subwoofer delivers a powerful, clear, and accurate low-end punch. With 2,000 watts (peak) of Class D power and a direct radiating, ported enclosure, it has all the muscle needed for the detailed low-frequency performance audio pros demand. It's custom 18-inch low-frequency transducer with a 4-inch voice coil provides 7 mm of driver travel before over-excursion to push more air and bring more thump.

Features:

• 18” Woofer with 4” Voice Coil 
• 7mm driver travel before over-excursion 
• Extended Bass preset 
• Polarity Invert 
• Onboard fully Variable Low Pass filter lets you dial in the upper-frequency limit 
• Maximum SPL 135 dB peak 
• 35 Hz to 150 Hz (variable) frequency response 
• 2000-watt Class D power (2 × 500W continuous) 
• Stereo Combo XLR and 1⁄4” inputs with direct outputs 
• Mono Mode sums both inputs to both outputs 
• Defeatable front-panel LED 
• Rugged, texture-painted eucalyptus enclosures 
• Tour-grade 16 gauge steel grilles 
• Comfortable ergonomic handles 
• Locking IEC connection