Yup, I bet I got it from the same guy off ebay. So your saying the woofer your using is a 4 ohm? The enclosure I built will be just over 2 CF with the woofer and amp installed. I'm going with a sealed enclosure first and see what performance I get out of it. If Im not happy with it sealed, I'll have to port it. If always been partial to sealed enclosures, I've just never built one for home audio use.