Subwoofers 1 x 18″, 3000W Class D subwoofer unit in direct radiation configuration Active / passive CLS-118S 1 x 21″, 3000 W Class D subwoofer unit in direct radiation configuration Active / passive CLS-121S 2 x 18″, 6000W Class D subwoofer unit in direct radiation configuration Active / passive CLS-218S 1 x 18” transducer, 132 dB SPL Install version available CXA-18S 1 x 18″ 3000W Class D, 132 dB Active / passive CPS-18S 2 x 15” transducers, 134 dB SPL Active / passive GXR-D15A 2 x 18” transducers, 135 dB SPL Active / passive GXR-D18A 1 x 18” transducer, 132 dB SPL GXR-18S 2 x 18” transducers, 139 dB SPL Weather-resistant available HR-218/36 2 x 18” transducers, 136 dB SPL Weather-resistant available HR-218/20 2 x 15” transducer, 133 dB SPLWeather-resistant available HR-215S 1 x 18” transducer, 129 dB SPLWeather-resistant available HR-18/10 1 x 12” transducer, 127 dB SPL ionic 12S 1 x 18” transducer, 132 dB SPL ionic 18S 1 x 18” transducer, 133 dB SPL DS-18S 1 x 12” transducer, 120 dB SPL BS-112 1 x 18” transducer, 126 dB SPL BS-118 1 x 8” transducer, offering 118 dB SPL SUB-08