18″ High Performance Direct Radiation Professional Subwoofer Enclosure design Bass Reflex Transducers 18” High performance woofer Continuous RMS Power [6dB Crest Factor, 2h] 1,250 W Nominal Impedance 8 Ohm Peak SPL [Full Space/Half Space 131/137 dB @ 1 m (2 ms, 5,000 W) Frequency Response [-3 dB] 36 -110 Hz ...