here is some info on the subs.
Studio Subwoofer Features
■ Up to 500 watts RMS, 750 watts peak power handling
■ 14mm Xmax (one-way linear excursion)
■ Optimized for small sealed or vented enclosures
■ Proprietary die-cast aluminum baskets for rock solid assembly
■ Wide nitrile butyl rubber surrounds allow more excursion at low frequency
■ Mineral-filled low resonance 1mm thick polypropylene cones
■ Four layer, 2.5" diameter voice coils on black anodized aluminum formers
■ Long throw motor assembly with bumped back plate and vented pole piece
■ 100 oz. magnet stack with 150mm front plates
■ Custom rubber magnet cover protects motor assembly
■ 5-way gold binding posts accept heavy gauge cabling
■ Freq Response: 35-2500HZ
■ Efficiency: 88db