The RFZ1410s black anodized aluminum
voice coil former, and multi-layer voice coils
stand up to serious power. Rockford Fosgate uses
a strong spruce pulp paper cone for exceptionally
musical bass. It rides on a durable
dual-laminated foam surround, which adds
suspension strength to the woofer. The vent in
the back plate of the magnet structure circulates
air around the voice coil to blow away heat. The
harder you play, the stiffer the breeze. The
inverted dust cap makes the cone more rigid, and
it helps force the air through the vent.