<1>Peak Power 300 watts <>RMS Power 150 watts <>Frequency response 25-350 Hz <>Injection-molded polymineral cone <>Double stich Santoprene® Surround <>Solid pole design <>Mounting depth 2-7/8" <>Impedance: Single 4 Ohm <>Injection molded SoloKon cone <>Ribbed Santoprene surround <>Stitched surround for enhanced cone-to-surround strength <>Extra strong adhesive and stitching prevents the cone from detaching from the surround <>Spiralead tinsel lead technology weaves the tinsel leads into the spider <>Super rigid cone and 360-degree back bracing eliminate distortion <>Sturdy steel basket holds the subwoofer mounted firmly <>Steel basket features perimeter venting around the single voice coil Strong spring-loaded terminals <>Newly re-designed 2010 basket structure <>Includes a built-in steel clearance adapter plate, which replaces part of the enclosure wall to allow shallower installations <>Shallow mount subwoofer allows for deep bass with minimum mounting depth <>Ventless pole piece for extreme power handling <>Shallow four-layer voice coil <>High-Temperature voice coil <>Powerful rear magnet