This patented cone/coil assembly allows the cast-aluminum basket and motor assembly to remain intact in the enclosure during reload, which allows these woofers to withstand high amounts of abuse and vibration. The SoloX are loaded with other features, such as a UniPlate V.2™ hyper-extended, pole/backplate assembly which is cooled by X-Vent technology and a vented pole's ARCTIC (Aluminum Rapid Cooling Thermal Induction Centering) cap, dual voice coils and oversized copper-clad-aluminum, edge-wound coil wire. All these features give speakers excellent heat transfer, pressure release and maximum power handling. The one-piece injection molded cone features a new spoke design, roller outer edging and stitched surroud providing strength and rigidity. If you are looking to upgrade your previous model SoloX BAM models, the SoloX SPAIRs will retro-fit with no modifications required. The 10" S10X offers an impressive 5000 W peak power with 2500 W RMS, has a resonance frequency of 40.5 Hz and a frequency response of 24-100 Hz. All SoloX models are available with dual 2-Ohm or dual 4-Ohm voice coils depending on your system needs.