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PreSonus

PreSonus ULT18s 18-inch Active Subwoofer

★★★★★5.0 (2 reviews)
000WXLR

Unleash Deep Bass with the PreSonus ULT18s Active Subwoofer The PreSonus ULT18s is an 18" active subwoofer designed to deliver powerful and accurate low-end reinforcement for any PA system. With its 2,000W Class D amplifier, custom transducer, and versatile connectivity, the ULT18s is perfect for...

$1,699.99*
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*Price sourced from Amazon.com. Last updated:Jun 27, 2026.Price and availability are subject to change.

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Overview

Unleash Deep Bass with the PreSonus ULT18s Active Subwoofer

The PreSonus ULT18s is an 18" active subwoofer designed to deliver powerful and accurate low-end reinforcement for any PA system. With its 2,000W Class D amplifier, custom transducer, and versatile connectivity, the ULT18s is perfect for mobile DJs, live venues, and installed sound applications.

Key Features

  • High Power Output: 2,000W Class D amplification for impactful bass response.
  • Custom Transducer: 18-inch woofer with a 4-inch voice coil for enhanced performance.
  • Adjustable Low Pass Filter: Dial in the perfect crossover frequency for seamless integration with full-range speakers.
  • Versatile Design: Includes M10 fly points, ground stacking options, and castor provisions for easy setup and transport.

Detailed Specifications

  • Brand: PreSonus
  • Model: ULT18s
  • Type: Active Subwoofer
  • Woofer Size: 18 inches
  • Voice Coil: 4-inch
  • Amplifier Power: 2,000W Class D (1,000W continuous)
  • Inputs: 2 x XLR/¼” combo with direct outputs
  • Features: Variable low pass filter, Polarity invert, Defeatable front-panel LED

Key Features

18-inch custom woofer with 4-inch voice coil with 7 mm driver travel

2,000W Class D power (1,000W continuous)

2 XLR/¼” combo inputs with direct outputs

Variable low pass filter lets you dial in upper frequency limit; Polarity invert

Defeatable front-panel LED for low-visibility installs

Specifications

Woofer Size
18-inch
Voice Coil
4-inch
Driver Travel
7 mm
Amplifier Type
Class D
Power Output (Peak)
2,000W
Power Output (Continuous)
1,000W
Inputs
2 x XLR/¼” combo
Outputs
Direct outputs
Controls
Variable low pass filter, Polarity invert
Indicators
Defeatable front-panel LED

Pros & Cons

👍 Pros

  • Features a powerful 18-inch custom woofer with a large 4-inch voice coil, delivering deep and impactful bass.
  • Offers impressive power handling with 2,000W Class D amplification (1,000W continuous).
  • Includes two versatile XLR/¼” combo inputs with direct outputs for flexible connectivity.
  • A variable low-pass filter allows precise control over the upper frequency limit for seamless integration.
  • Polarity invert function helps optimize phase alignment with other loudspeakers in the system.
  • The defeataable front-panel LED is useful for low-visibility installations where discretion is desired.

👎 Cons

  • The 18-inch woofer implies a substantial size and weight, potentially making portability challenging.
  • The 2,000W peak power may be overkill for smaller venues or home setups, requiring careful gain management.

Frequently Asked Questions

The PreSonus ULT18s features an 18-inch custom woofer, designed for powerful low-frequency reproduction.
It is powered by a 2,000W Class D amplifier, with a continuous power output of 1,000W.
The ULT18s is equipped with two versatile XLR/¼” combo inputs, offering broad compatibility with various audio sources.
Yes, it includes a variable low pass filter, allowing you to precisely dial in the upper frequency limit for optimal integration with full-range speakers.
Yes, there is a front-panel LED that can be defeated, making it suitable for low-visibility installations where a discreet presence is preferred.

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