TX2181 • 2 x 18" Subwoofer • 103 dB Sensitivity • 138 dB Max SPL • 1000 W Cont, 4000 W PeakThe Electro-Voice® TX2181 is a dual subwoofer system that is designed to add high-output, high-impact bass response to the TX2152 loudspeaker system.Technical Specifications:• Freq. Response (-3 dB): 50 Hz - ..