I've already stated why these guidelines should apply, so unless someone comes up with a new question I'm done arguing. It's really not that hard to understand. If the bet was emphasizing builder skill, the subs would have to be identical. This isn't mobile audio build-off 2007.

If the sub he was using was meant soley for a ported box it'd be one thing. But most every sub out there will work in a ported OR sealed enclosure. Any sub will almost always be louder in the correct ported enclosure as well. So find a 10" sub that performs better in a selaed enclosure. Come up with a new excuse.

I determined the guidelines because I made the bet. I feel the freedom to use any amp, any wiring/electrical supply, and control over your own sealed enclosure is enough.