APX 10 Quick Specs - Extreme SPL competition Woofer. - 3 seconds short burps up to 15,000 Watts. - Custom impedance matching to your amplifiers . * eXTREME SPL competition woofer * high sensitivity, extreme efficient motor to ensure high SPL possible * Rigid Die cast aluminum basket * Organic long fiber non-pressed cone body for accurate tight bass * Highly damped Kevlar and carbon fiber reinforced cone body * triple layers foam surround increase the power capacity of woofer * Extended neck joints on cone, coil and spider strengthen the integrity of moving structure for high power capacity * Compressed mounting ring gasket * vented coil for extra heat dissipation * 3 inch high temp aluminum voice coil * extended, machined cut one piece back plate * Powerful double stacked high energy magnet * over 2-1/2 inch long excursion motor structure * reinforced resin impregnated polycotton spider extend the life span of the speaker from material fatigue and collapse. * integrated heavy duty lead wire on spider prevent short circuit and melt down * dome shape dust cap design * low carbon front and back plate * Vented magnetic gap technology * Laser etched, machined and chromed back plate * handle up to 15,000Watts in 3 second short burps * custom matching impedance to amplifiers