Presonus AIR18s, Active Subwoofer, Equipment: 18"" Woofer with 3"" voice coil, Power: 1200 W peak (600 W RMS) class D amplifier, Frequency range (-3 dB): 30-150 Hz, adjustable, Maximum level: 129 dB, Built-in 2-channel mixer with XLR / jack combo inputs and stereo mini-jack, Outputs: 2 x Line Out (XLR), Adjustable low-pass filter for setting the upper limit frequency (no crossover), Customised DSP presets for different setup arrangements, Delay adjustable up to 12 m (Alignment Delay), Housing made of 15 mm plywood, Recessed M20 pole mount (suitable spacer rod: Article no. #462627#, not included), Dimensions (H x W x D): 662 x 490 x 656 mm, Weight: 38 kg, Colour: Black