guesstimates for home sub enclosure size

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   wife acceptance has reared its ugly head once more and the 5.1 system in my sitting room needs to lose its current sub.
the only place I can really put its replacement will be under a coffee table. this gives me max external dimensions of 320x300x1220mm

internally, before taking out driver, bracing, ports etc that gives me about 0.089m2 to play with.

the 12" driver I have to play with didnt seem like a contender when I looked at it about ten years ago (ciare pw324 - ancient, no t/s available) 

but, since I had a couple of minutes spare I ran some signal through it and measured fs at 28hz.

overall q seems lowish as there wasnt a huge change in measured voltage either side of resonance but since this has all been quick and dirty thats just a half educated guess

looking at the cone movement it looks to have a higher xmax than previously expected

so should I:

build the box at the 0.089m2 Ive got available and tune to 20-25hz

or 

build a sealed box at about 75% of that size and get all smiley on the eq

so, given thats what Ive got to play with what do you think I should do

Edited by godathunder - 07 December 2018 at 5:26pm