Several versions of the SA-8 v.1 exist -- you can CLICK HERE to help determine which one you have.
The SA-8 v.1 features a heavy duty 2" copper voice coil and a double layer sandwich spider pack to support it's high level of excursion and to facilitate it's tremedous output potential. It features the same unique voice coil ventilation system seen on the SA-10/12/15 woofers to help it achieve industry leading thermal power handling.
As with all Sundown Audio woofers the SA-8 is made to work in SMALL enclosures. By small we mean 0.5-0.6 cubic foot ported boxes. Due to the VERY strong motor of the SA-8 we DO NOT suggest using them in large enclosures.