I'm building a set of passive crossovers to do justice for the SSA Evil midwoofers and silk dome tweeters. This is a no compromise design that uses 48 (!) parts per set. They will be potted in epoxy resin inside ABS enclosures and hard wired with direct connection to the drivers. I have been working with these drivers for a while now and really like them. Install will be in a 1978 F-150 a good friend and I built. The rest of the system will be a SSA 150.4 and a 10" custom built PSI sub.