Need some wisdom please! Il300gws CMMD

CH46E

Hello everyone. I need a little guidance please.

I have two Infinity 12 inch IL300GWS CMMD drivers. I'm pretty sure them came out of a pair of IL60 speakers. I also think it's the same driver in thier Sub Two sub.

I'm trying to build a sealed single chambered enclosure. Problem I'm having is I cant get the TS specs. I tried Infinity and after 1 week they could not find them for me. To further my issue, there seem to be no (that i know of) instances where this sub came in a sealed enclosure. So I cant pull enclosure specs.

Would anyone happen to have the ts specs?
Or anyone able to give some educated guesses as to how much volume I should go with?

I'll have it wired for a single 2 ohm load and have 1,500 watts for power to throw at them. They will be used 60/40. 60 home theater. 40 music.

I did the same project last year with two 10 inch CMMD drivers with awesome results. I think I just got lucky.

Thank you for any advice and it will be greatly appreciated