For those of you looking to swap the sub out ( keep the stealthbox ) for something better. The internal volume is .625 cu/ft. That gives you allot options if you're interested in upgrading the subwoofer. Here is a few to list
Here is a decent list of inexpensive subs that will outperform the JL -
TC Sounds Epic 10
Dayton Audio Ultimax
Dayton Audio RSS line, both the HF and HO series
Peerless XXLS 10
ScanSpeak Discovery 10
SEAS L26ROY 10
Those all fall within the sub specs for the box size. You may have to experiment with acoustic fill or maybe take up some space with some MDF. Either way, it gives you guys options if you get tired of the JL sub. I wouldn't be afraid to throw any of them in that stealthbox. That HiVi SP10 would rock your world in terms of output. I think the CDT Audio QES would perform well.
Just thought I would throw some options out there for you guys....in case you get tired of the JL sub and looking for something else. All those listed are proven winners. People have ran them in al kind of box size depending on what you're looking for.
I think you can fit a W6 in there, which is a very good SQ sub...the only one I've considered from JL as a great all around sub. Not familiar with the new Version 3, but Version 2 is an awesome sub!! I believe the W6v2 is designed for the .625 space.