The EVX-155 woofer provides unprecedented power capacity, linearity
and excursion, made possible by the HeatWick™ total-thermal-engineering
design. The proprietary HeatWick design actually “wicks”
heat away from the voice coil, significantly increasing power handling
and long-term reliability. A special frame extension and elongated pole
piece provide a metal surface with close proximity to the entire length
of the voice coil, providing a major heat-transfer path.From the EV site.
My new subs are going to be neo drivers, and I haven't seen them yet, but I think I'll have to abandon the sinks. I'll use the hl's somewhere else one of these days.