Free Express Shipping! QSC E118SW E-Series 18" Passive Subwoofer (Black) For Live Stage, Theater, and DJ Setups, Low-Frequency Extension, 1 x 18" Woofer, Power Amp: 800W Continuous / 3200W Peak, Frequency Response: 37 to 230 Hz, Peak SPL: 133 dB, 4...