Thats the new style, he is asking about the old style. OP, to be honest, I wouldnt even bother sealing up a Type R. I hated mine sealed, it didnt sound any better and wasnt loud at all. I then put it in 2.3 cubes at 34hz and it sounded decent and got hella loud for an 80 dollar sub
The only way to do a wedge enclosure with 8" maximum depth is to build the box extremely wide or tall. For example:Sealed, with a max depth of about 8 inchs with an angled back if that helps. i tried looking on the alpine site and the owners manual on the alpine site and i couldnt find much info at all regarding the recommended enclosure size for them. if you could get a link for me that would be great?
Thanks