* Available in 10, 12, 15, and 18 inch diameters.
* Precision CNC-machined low-carbon steel motor structure with durable and attractive triple-polished nickel finish (534 oz. on SSX10.xx & SSX12.xx, 582 oz. on SSX15.22 & SSX18.22)
* Triple-stack strontium ferrite magnets with an attractive rubber magnet boot
* High-flow extreme diameter vented pole piece
* Extreme excursion motor structure and suspension design
* Five-layer Poly-ether UV-treated foam surround
* The largest high-temperature Nomex damper in car audio today allows 4 inches of excursion
* Integrated tinsel leads for increased reliability and enhanced sound quality at high excursion
* Attractive anti-resonance Die-cast aluminum basket with TREO Engineering-exclusive perimeter venting
* Kevlar-reinforced TREO-exclusive Penta-fiber cone
* Extreme power handling 4.0 Inch high temperature aluminum voice coils with integral heatsink on SSX15.xx and SSX18.xx
* Extreme power handling 3.0 Inch high-temperature aluminum voice coils with integral heatsink on SSX10.xx and SSX12.xx
* 2000 Watts RMS Power handling on SSX12.xx
* 2500 Watts RMS Power handling on SSX15.xx & SSX18.xx
* Dual 1 Ohm or dual 2 Ohm voice coils for a variety of installation options
* Nickel-plated spring-loaded push terminals retain up to 8 AWG wire
* Optimized for medium and large sealed, vented, and bandpass enclosures
* Built by hand in the United States from domestic and imported components
* Three-year dealer installed warranty
these are the specs on the woofers. i have the dual 1 ohm 12 subwoofer