Partsexpress has what appears to be an excellent deal on this VIFA Woofer http://www.partsexpress.com/pe/pshow...number=299-229 It states it is designed for auto sound, but would it be acceptible for Home use? Forgive me if the answer is obvious, but I'm new to DIY projects. What I'm looking for is a replacement driver for my RCA/Optimus SW Pro 100 sub. I got some great suggestions for improving sound and I've filled it with pollyfill and sealed the port. But the driver is still substandard. Thanks for any help. Bill S.