Presonus ULT18 Aktiv subwoofer

Unlike most subwoofers in this class, the ULT18 features a variable lowpass filter that enables you to accurately dial in the crossover transition between the subwoofer and your full-range system. Two DSP presets provide extended low-frequency performance or a more natural response to suit a variety of applications, and of course you get polarity reverse. A Mono Mode function is also provided to simplify cabling multiple mono subs in a stereo system. Like the full-range ULT12 and ULT15 loudspeakers, the ULT18 has a rugged, tour-grade birch enclosure for the distinctive performance characteristics that only wood can offer. A locking IEC power connector, M10 rigging points, integrated castor provisions, and ground-stacking provisions, making it a great choice for a wide variety of mobile and install applications. Two combo XLR and ¼” TRS line-level inputs with level control and throughputs are provided to connect full-range systems or multiple subwoofers in larger systems. As with the ULT12 and ULT15, you can defeat the front power-indicator LED for low-visibility installs. ULT18 loudspeakers were designed by WorxAudio®, the commercial loudspeaker division of PreSonus. Headquartered in Greensboro, North Carolina, WorxAudio has been at the forefront of loudspeaker development for the pro touring and contractor markets for the over 30 years. WorxAudio continues to embrace the latest technology, delivering innovative products and installation designs for professional clients, and their products can be found in prestigious facilities worldwide. So you can rely on ULT loudspeakers to deliver the top-quality professional performance and features that touring engineers and systems integrators need.

Features
Main Components
18-inch custom Kevlar woofer with 4-inch voice coil
7 mm driver travel before over-excursion
2,000W Class D power (2 × 500 W continuous)
Stereo combo XLR and ¼” inputs with direct outputs
Onboard fully variable lowpass filter lets you dial in upper frequency limit
Controls
Output Level
Lowpass Filter
Preset Select
Polarity Invert On/Off
Mono On/Off
Front LED On/Off
Convenience Features
Defeatable front-panel LED
Rugged, texture-painted birch enclosures
Tour-grade 16 gauge steel grille
Comfortable ergonomic handles
Ground Stacking provisions
Integrated castor provisions (castor kit sold separately)
Locking IEC connection