PreSonus ULT18 Active Subwoofer

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1,376.00 RRP 1,426.00 (including VAT @ 23%)

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This item is available to order, and we do not currently have the item in stock.

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"Estimated delivery to you" is our estimate of when we will be able to deliver the product to you, based on our supplier's normal delivery timescales. If we become aware it is going to take significantly longer than normal to deliver this item, we will let you know, otherwise, we will advise by email or text message when the item has been dispatched from our distribution centre.

Estimated delivery to you: 12th January 2017
FREE Delivery available.

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30 day money back guarantee included

30 day money back guarantee included

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Optional: 5 year warranty: €89.50
(Includes 90 day money back guarantee)


The product price includes a one year warranty and 30 day money back guarantee.

However, the Gear4music extended warranty scheme provides an enhanced service, and is designed to offer a higher level of protection than many 'free' warranties offered by some retailers and manufacturers.

The highlights of this enhanced warranty service are:

  • Warranty is extended to 5 years from the date of delivery.
  • Our Money Back guarantee is extended from 30 days to 90 days (terms apply after 30 days)
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  • Claim 50% cash back on the cost of the policy after 5 years if it has not been used!
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  • Loan or replacement equipment will be provided if the product isn't repaired within 30 days
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  • The policy can be cancelled within 30 days, and at any time after that for a pro-rata discount

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For customers in outlying areas of the country, the price of the Extended Warranty may be marginally higher, due to the potential for higher collection and redelivery transport costs.

This enhanced warranty is in addition to the standard Gear4music and manufacturer warranty policies, and the Gear4music terms and conditions of trade. No statement or condition of sale contained within these terms affects or restricts your statutory rights as defined under the Consumer Contracts Regulation 2014.

Product Ref: 68246

  • Class-D Amplifier with 1000W RMS Output
  • 18'' Custom Kevlar Woofer with a 4'' Voice Coil
  • Powerful, Accurate and Natural Low-End Punch
  • Two XLR/TRS Combo Inputs and Two XLR Outputs
  • Adjustable Lowpass Filter, Polarity Invert and DSP Presets

PreSonus ULT18 Active Subwoofer


The PreSonus ULT18 Active Subwoofer is designed to compliment any full-range PA speaker and is the perfect companion for the PreSonus ULT12 and ULT15 active PA speakers. The 18'' low-frequency woofer has a 4'' voice coil with 7mm driver travel before over-excursion, and is powered by a 1000W class-D amplifier. Delivering detailed performance with powerful and accurate low-end punch, the PreSonus ULT18 comes complete with an extensive range of controls and flexible connections for a range of audio sources.

Product Ref: 68246

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Full Description

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Extensive Controls Enable Customised Performance

The PreSonus ULT18 provides maximum versatility thanks to several critial user controls. Unlike most subwoofers in this class, the ULT18 is equipped with a variable lowpass filter that enables you to accurately dial in the crossover transition between the subwoofer and your full-range speakers. Two DSP presets deliver extended low-frequency performance or a more natural response, allowing you to tailor the sound to suit a variety of applications. The ULT18 comes complete with a Mono mode function which simplifies setting up multiple mono subs in a stereo system - perfect for larger venues such as night clubs.

Hearing is Believing

With flexible connectivity, a rugged tour-grade enclosure and enormous class-D power, the PreSonus ULT18 delivers the versatility and punch expected from today's professional sound systems. Perfect for both permanent installations, tours and mobile use, the ULT18 seamlessly integrated with both ULT-series full-range speakers and third-party loudspeakers. Most important, the ULT18 delivers outstanding low-end clarity and natural music reproduction in any application.

Designed by WorxAudio

The ULT18 subwoofer has been 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 professional touring and contractor markets for over 30 years. WorxAudio continues to embrace the latest technology to deliver innovative products for audio professionals, all of which can be found in facilities worldwide. You can rely on the ULT18 to deliver the top-quality performance and professional features that touring engineers demand.


  • 18'' custom Kevlar woofer with a 4'' voice coil
  • 7mm driver travel before over-excursion
  • 2000W class-D power (2 x 500W continuous)
  • Stereo combo XLR and 1/4'' inputs with direct outputs
  • Onboard fully variable lowpass filter lets you dial in upper frequency limit
  • Extensive range of controls including output level, preset select, polarity invert and more
  • Rugged enclosure
  • Comfortable ergonomic handles
  • Locking IEC connection
  • Ground stacking and integrated caster provisions (kit sold separately)


  • Configuration: Powered Subwoofer, Ported
  • Frequency Response: 45Hz - 250Hz
  • Maximum SPL: 135dB (Peak)
  • Crossover Frequency: 90Hz
  • Low Frequency Transducer: 1 x 18'' Ferrite
  • Voice Coil Diameter: 4''
  • Amplifier Type: Class-D
  • Power Output: 2000W Peak / 1000W RMS
  • Low-Freqency Power: 2 x 500W Bridged (1000W Total)
  • Cooling: Free Air Convection
  • Rated THD:
  • Dynamic Range: 119dB (A-Weighted)
  • Bandwidth: 20Hz - 20kHz
  • Input Channels: 2
  • Input Connectors: Combo
  • Input Impedance: 10kΩ
  • Maximum Input: +22dBu
  • Output Connectors: 2 x XLR (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
  • DSP Preset: Extended LF
  • DSP Bit Depth: 24-Bit
  • Sample Rate: 96kHz
  • Enclosure Finish: Chemline™ Polyurethane
  • Grille: Powder-Coated Steel
  • Dimensions: 22.5'' x 25'' X 24.5'' / 572mm x 635mm x 622mm (H x D x W)
  • Weight: 95lbs / 43kg
  • Amplifier Protection: Over-Current, DC, Over/Under-Voltage, Over-Temperate, High Frequency
  • Transducer Protection: Limiter
Your order may be delivered with a plug adapter
If any electrical items in your order are supplied with a United Kingdom plug connection, a suitable plug conversion adapter will be included free of charge.