The AIR18S from PreSonus is a versatile and customizable subwoofer featuring 1200W of power and enhanced digital tuning functions, well suited for live bands, DJs, clubs, event halls, bars, speaking engagements, and more. The subwoofer is designed to work with the AIR10, AIR12, and AIR15 full range speakers, but is quite capable of adding low end to any sound system, regardless of manufacturer. The AIR18S utilizes a single 600W (continuous) Class-D amplifier to power the 18" woofer for efficient and clean low end performance with a max SPL output of 137 dB SPL and frequency response of 35 Hz to 150 Hz (-3 dB).

The integrated and easy-to-use digital signal processor (DSP) allows you to customize the subwoofer for a number of applications including Mo'Bass, FOH, Cardioid, and Endfire presets. The cardioid and endfire presets allow for off axis rejection and a uniform bass response throughout the room. Additionally, the variable low pass filter and variable alignment delay functions allow you properly dial in your subs with any available tops. The Air18S ships with a power cord and a caster kit.

Main Components

  • 1,200W (dynamic) power amp configuration
    • Low-Frequency Driver: 600W (continuous), Class D amplifier
  • 18" woofer with a 3" voice coil
  • 35 to 150 Hz frequency response (-3 dB)
  • 137 dB SPL (max)
  • Two combo XLR-1/4" inputs
  • Two balanced XLR outputs


  • Easy-to-use DSP performance presets:
    • Mo'Bass: Bass boost
    • FOH: Normal front-of-house
    • Cardioid: Two subs working to form a cardioid directional pattern
    • Endfire: Creates off axis rejection
  • Variable low pass filter
  • Variable alignment delay

Convenience Features

  • Comfortable ergonomic handles
  • 35mm pole socket for speaker poles
  • Defeatable front-panel LED
  • Rugged 15mm tour-grade birch plywood construction
  • Includes caster kit
PA Speaker
Configuration Active Subwoofer
Enclosure Type Bass-Reflex Subwoofer
Total Power Capacity 1200 W Peak 
600 W RMS 
Amplifier Class Class-D
LF Driver 1 x 18" / 45.7 cm Woofer
LF Voice Coil 3" / 7.6 cm
Frequency Range 35 Hz to 150 Hz -3 dB
Maximum SPL 137 dB
Audio I/O 2 x Combo XLR-1/4" TRS Line/Mic Input
2 x XLR Mix Output
AC Input Power User Selectable:
100 to 120 VAC, 50 / 60 Hz 
220 to 240 VAC, 50 / 60 Hz 
Mounting 1 x Pole Socket
Handles 2 x Side
Construction Material Metal Grille, Plywood
Dimensions 29.5 x 23.2 x 29.9" / 74.9 x 58.9 x 75.9 cm
Weight 83.8 lb / 38 kg
Packaging Info
Package Weight 92.5 lb
Box Dimensions (LxWxH) 30.0 x 29.25 x 23.5"

PreSonus AIR18S Active Sound-Reinforcement Subwoofer