\n\n Sound Reinforcement Subwoofer \n

Designed to complement any full-range PA loudspeaker and a perfect companion for the PreSonus ULT12 and ULT15, the 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.

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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.

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Key Features

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• 18-inch custom Kevlar woofer with 4-inch voice coil
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• 7 mm driver travel before over-excursion
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• 2,000W Class D power (2 × 500 W continuous)
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• Stereo combo XLR and 1/4" inputs with direct outputs
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• Onboard fully variable lowpass filter lets you dial in upper frequency limit
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• Output Level
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• Lowpass Filter
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• Defeatable front-panel LED
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• Rugged, texture-painted birch enclosures
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• Tour-grade 16 gauge steel grille
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Technical Specifications

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Acoustic Performance\nConfiguration:\nPowered subwoofer, ported\nFrequency Response (-3 dB):\n45 Hz - 250 Hz\nMaximum Peak SPL:\n135 dB\nCrossover Frequency:\n90 Hz\nTransducer\nLF Transducer:\n1x18" Ferrite\nVoice Coil Diameter:\n4"\nAmplifier\nType:\nClass D\nTotal Power Output:\n2,000W Peak (1,000 RMS)\nLF Power:\n2 x 500W bridged (1000W total)\nCooling Free air convection\nRated THD:\n<0.05% (20 Hz - 20 kHz)\nDynamic Range:\n119 dB (A-weighted)\nBandwidth:\n20 Hz - 20 kHz\nConnections and Controls\nInput Channels:\n2 line\nInput Connector Types:\n2 combo\nLine Input Impedance:\n10 k ohms\nMaximum Input:\n+22 dBu\nOutput Connector:\n2 XLR (M): Mix out, Direct out\nControls:\nOutput Level\nLow Pass Filter\nPreset Select\nPolarity Invert On/Off\nMono On/Off\nFront LED On/Off\nIndicators:\nDSP Preset, Polarity Invert On/Off, Mono On/Off, Front LED On/Off, Signal, Clip, Thermal\nDSP\nPresets Extended LF\nPolarity Normal or Reverse\nBit Depth:\n24-bit\nSample Rate:\n96 kHz\nEnclosure\nMaterial:\n18 mm Baltic birch\nFinish:\nChemline polyurethane\nGrille:\nPowder-coated steel\nDimensions (HxDxW):\n22.5 x 24.5 x 25 (572 mm x 622 mm x 635 mm)\nUnit Weight:\n95 lbs. (43 kg)\nHandles :\n2 (One on each side)\nSafety\nAmplifier Protection:\nOver-current, DC, over/under-voltage, over-temperature, high frequency\nTransducer Protection:\nlimiter\nPower\nAC Power Input:\n100-230V~, 50-60 Hz\nAC Power Consumption (1/8 Power):\n150W\nSuspension Mounting\nRigging Points:\n12 M10\nMounting:\nGround stack provisions