kappa perfects 10 box

I have a pair of Kappa Perfects (10") and on the specifications it recomends a small box (17L or 0.66 cubic feet).  Im wanting to get the maximum SPL output for these subs in a sealed box.  Can any1 share there experiences with this product and an appropriate box to maximise results

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Clarion DB36MP
Infinity Kappa Perfect 10"
Respone 800w Mono
ALPINE MRP-F250
*Custom fabrications*

I had a pair of Kappa perfect 10's. I now have one kappa perfect 12.1 (svc). These subs sound great in sealed enclosures, and they can get loud with sufficient power. They are primarily sound quality subs though. I don't recall what the rms rating for the 10's are...but I think it is 350 watts RMS. If I were you, I would make the box to specs, or maybe just a tad larger for each sub. Maybe .75 cubic feet plus another tenth or so to account for the sub itself (in each chamber). Then over power them slightly. Infinity is conservative with the amount of power these subs can take. I would push about 400 to 450 watts to each sub and you should be pleased with the results.

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2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Bigger sealed box = lower power handling