09 Accord Box

Ok I have a friend who just got a new accord and I was wondering if anyone has built a box for one yet? I need maximum height dimensions that will allow it to fit through the trunk opening yet still slide as far back as possible. I drew a box up in sketchup that is about 2.75 cubes net tuned to around 35hz. It's for a '08 l7 which I think he needs to get rid of because the new accords shouldn't be subject to such a non sexy sounding driver. But anyways anyone know the sub displacement for a 12" 08 L7 offhand because they don't have it inthe manual for some reason? Thanks

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