Dual 18″ Direct Radiation Multipurpose & Touring Subwoofer Enclosure design Bass Reflex Transducers 2 x 18" Continuous RMS Power [6dB Crest Factor, 2h] 2,500 W Nominal Impedance 4 Ohm Peak SPL [Full Space/Half Space 133/139 dB @ 1 m (2 ms, 10 KW) Frequency Response [-3 dB] 36 -110 Hz Dimensions [WxHxD] ...