JBL JRX 218S is an 18-inch passive subwoofer with up to 350W / 4Ω and max SPL 133dB, sensitivity 98dB with 34Ηz-250κΗz frequency response. It has a wooden enclosure and a SS3BK pole-mount socket on top.
Q-SYS PL-SUB15, passive installation subwoofer that features an 15-in transducer, οmnidirectional or cardioid radiation, selectable in Q-SYS (requires deployment of two or more subwoofers), with up to 750W @ 8Ω continous power and 1500W @ 8Ω rated power, 41Hz - 93Hz at -3dB system bandwidth and 96dB system sensitivity. Features a weatherized enclosure (IP54 rating), making them a perfect choice for indoor or protected outdoor applications.
QSC Subwoofer AD-SS28TW-BK with two 8 "woofer weather resistant, power 250W Continuous (700W peak), with 120Hz low-pass filter with friction compensation. It has a 70V / 100V transformer with 8Ohm bypass. Cabin in black. Dimensions (HxWxD) 404 x 251 x 603mm - 19.5 kg.
Metro Audio Systems LA-180FL, professional passive sub with 18 inches woofer by Lavoce and up to 750W AES / 1500W Program at 8Ω, frequency response 35Hz-250Hz, Max SPL 135dB και 99dB/2.83V/m sensitivity.
Modern Acoustics Hammer12p - professional passive subwoofer 15 inches with power 450 W RMS / 1800 W Peak, frequency response 32 Hz - 200Hz (± 10dB), 129dB max SPL (peak), sensitivity 97dB. Cabin: black color, with two handles for easy carrying and speaker holder Dimensions (H x W x D): 600 x 560 x 420 Weight: 24,3 kg