Fits: Polk Audio 10 Ultra Marine Subwoofer MM1040UM Designed specifically for use in the marine environment. New polymer woofer cones and butyl rubber surrounds will not break down over time. High temperature 2" copper voice coil withstands rigorous use while maintaining extremely low distortion for bass punch and output. Stainless steel heavy duty input terminals will not corrode or tarnish. Will accommodate speaker wire up to 8 AWG or twisted pairs of 12 AWG. Power Handling: 700WPeak 350W RMS Frequency Response: 24Hz - 200Hz Sensitivity: 91dB Impedance: 4 Ohms Resonant Frequency 35 Hz Cutout Diameter: 9-1/8" Mounting Depth (top): 4-5/8" (bottom): 5-3/16"
Polk Audio 10 Ultra Marine Subwoofer, MM1040UM