PreSonus ULT18 18" Active Sound-Reinforcement Subwoofer

Info

Built to work alongside the ULT speakers, the PreSonus ULT18 subwoofers deliver powerful low-end audio.

Low-end punch you can hear and feel.
Designed to complement any full-range PA loudspeaker and a perfect companion for the ULT12 and ULT15, the PreSonus 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. Its custom 18-inch Kevlar® low-frequency transducer with 4-inch voice coil provides 7 mm of driver travel before over-excursion to push more air and bring more thump.

Extensive controls enable customized performance.
To provide maximum versatility, the ULT18 offers several important user controls. 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.

Equally at home in mobile and installed systems.
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.

Designed by WorxAudio.
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.

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 1/4" inputs with direct outputs
Onboard fully Variable Low Pass 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

Acoustic Performance

Configuration Powered subwoofer, ported
Frequency Response (-3 dB) 45 Hz - 250 Hz
Maximum Peak SPL 135 dB
Crossover Frequency 90 Hz

Transducer

LF Transducer 1x18" Ferrite
Voice Coil Diameter 4"

Amplifier

Type Class D
Total Power Output 2,000W Peak (1,000 RMS)
LF Power 2 x 500W bridged (1000W total)
Cooling Free air convection
Rated THD <0.05% (20 Hz - 20 kHz)
Dynamic Range 119 dB (A-weighted)
Bandwidth 20 Hz - 20 kHz

Connections and Controls

Input Channels 2 line
Input Connector Types 2 combo
Line Input Impedance 10 k ohms
Maximum Input +22 dBu
Output Connector 2 XLR (M): Mix out, Direct out
Controls
- Output Level
- Low Pass Filter
- Preset Select
- Polarity Invert On/Off
- Mono On/Off
- Front LED On/Off
Indicators DSP Preset, Polarity Invert On/Off, Mono On/Off, Front LED On/Off, Signal, Clip, Thermal