PreSonus AIR18s 18 Inch 1200W Active SoundReinforcement Subwoofer Black

Designed to complement any full-range PA loudspeaker, and aperfect companion for the PreSonus AIR series, the PreSonus AIR18s ActiveSubwoofer delivers a powerful, clear, and accurate low-end punch. With its 18-inchlow-frequency transducer, driven by 1200 watts (peak) of Class D power, itprovides plenty of detailed bottom end, all the way down to 30 Hz.DesignDespite its power, the AIR18s is portable, compact, andlightweight, with a rugged, tour-grade birch enclosure. It is easy to transportand suitable for mobile applications, as well as installs, with integratedprovisions for the included caster kit, ground-stacking provisions, andergonomic handles on both sides.FeaturesAIR-series subwoofers feature easy-to-use controls andsignal-processing presets. Set them for normal front-of-house use or boost thelow-end with the Mo' Bass preset. Reverse polarity, use the lowpass filter toset a crossover frequency, adjust the power amp's master output level, and eventurn the grille LED off for installs-all at the touch of a button. A variablealignment delay properly aligns your three-way system. Most subwoofers areessentially omnidirectional, which can cause feedback onstage and makemonitoring difficult. Creating a subwoofer array helps keep excess energy offof the stage and in the audience. AIR-series subwoofers provide the tools youneed to create these arrays with ease. Most importantly, the AIR18s soundsgreat, delivering outstanding low-end clarity and natural music reproduction.Creating Subwoofer ArraysTwo subwoofers in a traditional stereo configuration cancause a build-up of excess energy onstage. AIR subwoofers’ Cardioid DSP presetmakes it easy to create a cardioid array with a more direct radiation pattern,keeping energy offstage and in the audience. Or create an end-fire array foreven more off-axis rejection, using the Endfire preset.AIR18s Inputs,Outputs, and MoreThe AIR18s sports two combo XLR and 1/4-inch TRS line-levelinputs with level control, and throughputs are provided to connect full-rangesystems or multiple subwoofers in larger systems. You can even defeat the frontpower-indicator LED for low-visibility installs or set it to illuminate onlywhen the protection limiter is engaged.System Alignment and Crossover SettingsThe AIR18s’ variable alignment delay properly aligns yourthree-way system, whether the full-range loudspeaker is placed atop thesubwoofer, using the sub pole, or is placed a few feet away. A variable lowpassfilter enables you to dial in the best crossover point. Optimized settings areprovided for AIR-series full-range loudspeakers.