I just picked up a JBL sub enclosure from a 94. It was already upgraded to the JL 6W0 4 ohms. The resistance tested good but the foam is junk. I ordered a kit for $20 to rebuild it. Still has the stock amp, which may not even work.... I've given some thought to just upgrading to a proper aftermarket amp though. So, my question is regarding the enclosure. I've read that the enclosure is 0.38 ft3. The 6W0 calls for 0.17 ft3 sealed and 0.25 ft3 ported. See this. Has anybody ported the stock enclosure with this sub? How about an aftermarket 100w amp vs oem?