JBL AC115S Woofer - 400 W RMS - Black - 1600 W (PMPO) - 15" - 40 Hz to 250 Hz - 8 Ohm 8 Ohm impedance extracts maximum power so you will get more output from your speakers Hear every detail crisp and clear with a frequency response of 40 Hz-250 Hz Knock yourself out with 400 W RMS power 15" woofer driver size allows better stereo imaging with maximum sound feasibility Delivers reliable sound with 250 Hz maximum frequency response 94 dB sensitivity for efficient conversion of power into sound to produce adequate audio output 19" height for maximum coverage efficiency and feasible operation 16.5" width for efficient antenna power radiation to ensure optimal operation and usage 23.62" depth to ensure dependable sound output efficiency 52.91 lb Weight (Approximate) for placement, carrying, and fixing considerations