Hey guys. A while ago, I saw this post on Sundown Audio's facebook page explaining the differences of each of their 8 inch subwoofer lines. Thought I'd post it here and hopefully it'll get stickied for others to find easily.
In order to help with your choice of which 8" woofer to buy from our line-up here is a brief summary :
E-8 v.4 : Traditional sounding woofer -- very similar performance to the older SA-8 v1 and 1.5 models both mechanically and thermally. It is optimized for ported enclosures.SD-2 8 : Under-hung, ultra low distortion woofer. Sound is more similar to our new platform drivers like the X and Z v.4 series due to flat suspension compliance curve. It is optimized for sealed enclosures & is the only 8" that we produce that I recommend for sealed enclosures.SA-8 v.3 : Over-hung, low distortion driver optimized for ported boxes. The SA-8 v.3 also has a very flat compliance curve (same spider design as SD-2 model but 2x the stiffness) making it more similar to the X and Z v.4 type sound.X-8 : Traditional sounding woofer -- "punchy" -- the surround & spider were designed with a traditional compliance curve in mind resulting in a very punchy sound. This woofer is more optimized for SPL than any of our other 8s.Found here: https://www.facebook.com/sundownusa/posts/833769213345218