QSC KS212C 12" Subwoofer with Speaker Pole Package | IDJNOW
KS212C Active Dual 12-inch Cardioid Subwoofer
QSC - Cardioid subwoofer? What's that? Here's an FAQ about the 3600 W KS212C powered cardioid subwoofer! https://www.qsc.com/resource-files/productresources/spk/ks/ks212c/q_spk_ks_212c_faq.pdf | Facebook