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Presonus - ULT18 (Active Sound-Reinforcement Subwoofer)

The ULT18 Active Sound-Reinforcement Subwoofer from PreSonus is an 18" custom woofer with a 4" voice coil driven by 2000W of Class-D power in a direct-radiating ported enclosure. Designed to complement any full-range PA loudspeaker, it can be used to deliver low-frequency performance in sound-reinforcement applications for live stage, theater, clubs, and more.

The speaker inputs feature two combo XLR-1/4" connectors with direct outputs and polarity invert. The subwoofer's low-frequency transducer and voice coil provide 7mm of driver travel before reaching over-excursion. This allows it to push more air and bring more thump. In addition, a built-in variable low-pass filter lets you dial in the upper-frequency limit.

Designed with M10 fly points, ground-stacking provisions, castor provisions, and a defeatable front-panel LED, the ULT18 active subwoofer is a suitable choice for both mobile or install applications.

  • 18-inch custom low-frequency driver with 4" voice coil
  • 2000W of Class-D power
  • Two combo XLR-1/4" inputs with direct outputs
  • 7 mm driver travel before over-excursion
  • Defeatable front-panel LED
  • Rugged, texture-painted birch enclosures with tour-grade 16-gauge steel grille
  • Comfortable ergonomic handles

PreSonus ULT18 Specs

Type Active subwoofer
LF Driver Size 18" (45.7 cm)
Voice Coil: 4" (10.2 cm)
System Power 2000 W (peak)
Frequency Range 42 Hz to 250 Hz variable (+/- 3 dB)
Crossover Frequency 90 Hz
Max Peak SPL 135 dB
Mounting 12 M10
Dimensions (L x W x D) 22.5 x 24.5 x 25.0" (57.1 x 62.2 x 63.5 cm)
Weight 90 lb (40.8 kg)

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