QSC KS212C K Cardioid dual 12" powered subwoofer — 3600 watts peak at Crutchfield
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
QSC KS212C dual 12-inch, active cardioid subwoofer
Review: QSC KS212C Cardioid Subwoofer - Church Production Magazine