JBL Professional ASB6128 Woofer - 1600 W RMS - Black - 6400 W (PMPO) - 18" - 35 Hz to 1 kHz - 8 Ohm 8 Ohm impedance extracts maximum power so you will get more output from your speakers Hear low subs and soaring vocals with a frequency range of sound from 35 Hz-1 kHz Experience body-shaking levels without any room-vibrating reverb or excessive heat output with 1600 W RMS power 18" woofer driver size allows better stereo imaging with maximum sound feasibility Offers great productivity with 1 kHz maximum frequency response 102 dB sensitivity for efficient conversion of power into sound to produce adequate audio output 43.1" height for maximum coverage efficiency and feasible operation 22.1" width for efficient antenna power radiation to ensure optimal operation and usage 32.20" depth to allow maximum Woofer sound output efficiency 160.94 lb Weight (Approximate) for placement, carrying, and fixing considerations