Diamond Audio 12" Subwoofer 1200m peak D612D4 600W RMS

Heat dissipating alloy woofer. This 12" D6 sub features a rigid, lightweight anodized alloy cone held in place by a sturdy, special-design rubber surround. Diamond Audio uses an aluminum-finned radial heatsink to pull damaging heat away from the motor assembly — the alloy cone and aluminum dust cap also direct heat upwards and outwards, so it doesn't end up trapped in your subwoofer enclosure.